# H5N1: The Ledger of a Virus That Has Not Crossed Over - Canonical dossier: [Web edition]() - Markdown edition: [Plain-text edition]() - Issue: Issue 011 - Rubric: Crisis-intelligence magazine - Byline: Totally Fine Foundation editorial desk - Reading time: 9 min - Last reviewed: 2026-07-06 > Seventy-one US human cases since February 2024, a thousand worldwide since 2003, and — on every dated snapshot here — no confirmed chain from one person to the next. The story is the watching: tens of thousands of exposed people monitored so a single human link would be seen. ## Cover - Kicker: Field dossier / Disease / active surveillance - Cover lines: Seventy-one cases, no confirmed chain / Low for the public, higher at the barn door / Three ledgers, never one / The number the columns hold is zero #### Hero visual provenance - Caption: H5N1 virus particles under an electron microscope — a laboratory specimen, not an image of the 2024-25 cattle clade. - Alt text: Colorized transmission electron micrograph of avian influenza A(H5N1) virus particles. - Credit: Cynthia Goldsmith / CDC - Rights / license: Public domain, via Wikimedia Commons - Asset: [View image]() - Original / provenance: [Open source]() ## Metrics ### 71 — US human A(H5) cases since Feb 2024 - Category: human ledger - Caveat: CDC summary captured 6 Mar 2026; 7 via flu surveillance, 64 via animal-exposure monitoring; a floor given farm-worker testing gaps. **Source trail:** [CDC — A(H5) Bird Flu Situation Summary (with human-monitoring page)]() (`h5n1-cdc-situation`) #### Visual provenance - Caption: The US human ledger: 71 cases, caught two ways, no confirmed chain. - Alt text: Data surface: 71 US human A(H5) cases with no confirmed person-to-person chain. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### 1,000 / 479 deaths — Global confirmed human H5N1 since 2003 - Category: human ledger - Caveat: WHO/GIP table, data in HQ as of 8 May 2026; laboratory-confirmed individuals incl. asymptomatic; the ~48% fatality figure is arithmetic, not WHO-printed. **Source trail:** [WHO Global Influenza Programme — Cumulative number of confirmed human cases of avian influenza A(H5N1), 2003 onward]() (`h5n1-who-cumulative`); [WHO Regional Office for the Western Pacific — Avian Influenza Weekly Update (Western Pacific)]() (`h5n1-who-wpro`) #### Visual provenance - Caption: The world's human ledger since 2003, cited to its printed data date. - Alt text: Data surface: 1,000 confirmed human H5N1 cases and 479 deaths since 2003. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### 33,100 / 1,340 — People monitored / tested after animal exposure - Category: surveillance effort - Caveat: Feb 2022-30 May 2026, CDC; an effort metric, NOT infections — most monitored people are never infected. Keep separate from the 71. **Source trail:** [CDC — A(H5) Bird Flu Situation Summary (with human-monitoring page)]() (`h5n1-cdc-situation`) #### Visual provenance - Caption: The watching, as effort: 33,100 monitored, 1,340 tested. - Alt text: Data surface: at least 33,100 monitored and 1,340 tested — effort, not infections. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### \>1,000 / 19 states — US H5N1-infected dairy herds - Category: animal ledger - Caveat: Peer-reviewed floor (CDC EID, 30 Jan 2026) + AVMA state count (16 Dec 2025); a 1,154-herd figure is unverified vs the unreachable APHIS dashboard; separate ledger from human cases. **Source trail:** [USDA APHIS — HPAI Detections in Livestock (dairy-herd tracker)]() (`h5n1-usda-aphis`) #### Visual provenance - Caption: The animal ledger's fastest-moving column: herds and states. - Alt text: Data surface: more than a thousand infected US dairy herds across nineteen states. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### ~6.4M in one month — Poultry dead or culled, December 2025 - Category: animal ledger - Caveat: WOAH SR-78, single month; the long-run 2005-2024 loss exceeds 633 million (peak 146M in 2022) — never blend month and decade. **Source trail:** [WOAH (World Organisation for Animal Health) — High Pathogenicity Avian Influenza Situation Report 78]() (`h5n1-woah-sr78`) #### Visual provenance - Caption: The poultry column: a single month, held apart from the decade. - Alt text: Data surface: about 6.4 million poultry dead or culled in December 2025. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### 464 sampled, 0 viable virus — Retail pasteurized-milk testing - Category: food-safety ledger - Caveat: FDA page frozen at 14 Mar 2025; two retail surveys found ~20% (60/297) and ~17% (29/167) PCR-positive for fragments, zero live virus; PCR fragments are not infectious virus; raw milk is a separate category. **Source trail:** [FDA — Investigation of Avian Influenza H5N1 Virus in Dairy Cattle]() (`h5n1-fda-milk`) #### Visual provenance - Caption: The food-safety ledger: sampled, negative for live virus. - Alt text: Data surface: 464 pasteurized products sampled with no viable virus. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ## A virus watched more closely than almost any other, and a crossing that has not happened. ### Seventy-one, and no confirmed chain between them The US human tally is small and specific. CDC records 71 human A(H5) cases in the United States since February 2024 — seven caught by national flu surveillance, sixty-four by monitoring people who worked near infected animals. The agency's own reading of that count is a plain sentence carried on the same page: the current public-health risk is low, while it keeps watching and works with states to monitor people with animal exposures. No known person-to-person spread has occurred with the A(H5N1) viruses circulating in birds in the United States and globally, CDC says. Read that line the way the source writes it — an absence of confirmation as of the stated date, not a claim that such spread cannot happen. The count is best read as a floor: nearly all confirmed US infections have been in dairy and poultry workers with direct exposure, and farm-worker testing is a known surveillance gap. **Source trail:** [CDC — A(H5) Bird Flu Situation Summary (with human-monitoring page)]() (`h5n1-cdc-situation`) #### Visual provenance - Caption: The opening ledger: seventy-one cases, and the column that quietly holds zero. - Alt text: Data surface: 71 US human A(H5) cases with no confirmed person-to-person chain. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### Three ledgers, and the discipline of not merging them There are really three counts in this file, and the whole story turns on keeping them apart. The first is human cases — 71 in the US, a thousand worldwide since 2003. The second is animal outbreaks, a barn-and-flock ledger the US Department of Agriculture keeps one weekday at a time. The third is the watching: between February 2022 and 30 May 2026, CDC reports, at least 33,100 people were monitored and at least 1,340 tested for novel influenza A after animal exposure. Those are surveillance-effort metrics, not infections — most monitored people are never infected. The tens of thousands are not a hidden outbreak; they are the reason a single human-to-human link would be seen at all. Merge that number with the 71, and you have invented an epidemic that the source does not report. **Source trail:** [CDC — A(H5) Bird Flu Situation Summary (with human-monitoring page)]() (`h5n1-cdc-situation`); [WHO Global Influenza Programme — Cumulative number of confirmed human cases of avian influenza A(H5N1), 2003 onward]() (`h5n1-who-cumulative`) #### Visual provenance - Caption: The central discipline of the file: three counts that must never be added. - Alt text: Data surface: human cases, animal outbreaks and surveillance effort kept as three separate ledgers. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original sources linked - Asset: [View image]() - Original / provenance: [Open source]() ### The barn count that only one agency still keeps The animal side is a different ledger with a different shape. Peer-reviewed work published in a CDC journal in January 2026 logs more than a thousand H5N1-infected dairy herds across the United States, most concentrated in California; the American Veterinary Medical Association's tracker lists nineteen states with H5N1 confirmed in dairy cattle. The 2024 jump into cattle gave the virus a mammalian host on a scale it had never held before. A June 2026 newspaper reading of USDA's live dashboard put the running total higher — 1,154 affected herds since March 2024, with forty new Idaho detections in a single trailing month — but those figures come from the newspaper, not the agency, and could not be checked: the APHIS dashboard was unreachable throughout the reporting, and the same article contradicts itself on whether nineteen or twenty states are affected. The verified floor is what stands, and it is a barn count, kept in its own column. **Source trail:** [USDA APHIS — HPAI Detections in Livestock (dairy-herd tracker)]() (`h5n1-usda-aphis`) #### Visual provenance - Caption: A US dairy herd as context; the herd counts themselves live in the USDA and CDC data. These animals are not identified as infected. - Alt text: Dairy cattle feeding at a Michigan farm. - Credit: Dwight Burdette - Rights / license: CC BY 3.0, via Wikimedia Commons - Asset: [View image]() - Original / provenance: [Open source]() ### A thousand cases in twenty-three years, and the fortnight that read as routine Widen the frame to the world and the human ledger lengthens but does not accelerate. WHO's cumulative table counts every laboratory-confirmed human H5N1 case reported since 2003; as of the data date printed on the current version, 8 May 2026, the total is 1,000 cases and 479 deaths from twenty-five reporting countries. The table is overwritten in place — the figure moved from 993 to 997 to 1,000 across three 2026 revisions — so any number must be cited to the printed data line, not the file name. Zoom back in to a single fortnight and the surveillance reads as routine. In WHO's Western Pacific bulletin for 5 to 18 June 2026, no new human H5N1 case was reported to the region; the last traced to Cambodia with symptom onset on 15 April. The only new human infections were two children with the milder H9N2, both linked to poultry, neither to another person. WHO's bottom line is stated as an absence: no sustained human-to-human transmission identified, and sustained spread currently considered unlikely, even as the zoonotic threat stays elevated because the viruses keep spreading among birds. **Source trail:** [WHO Global Influenza Programme — Cumulative number of confirmed human cases of avian influenza A(H5N1), 2003 onward]() (`h5n1-who-cumulative`); [WHO Regional Office for the Western Pacific — Avian Influenza Weekly Update (Western Pacific)]() (`h5n1-who-wpro`) #### Visual provenance - Caption: The global human ledger, lengthening without accelerating. - Alt text: Data surface: 1,000 confirmed human H5N1 cases and 479 deaths since 2003. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### How to read the risk The honest register here is neither alarm nor all-clear, and it splits along a single line: exposure, not geography. ECDC, assessing the clade circulating in Europe, rates the risk low for the general public and low-to-moderate for those exposed to infected animals; CDC rates it moderate-to-high for people in direct contact with infected animals while calling the general-public risk low. Both halves are official and simultaneously true for their respective populations. On the food side, FDA files the dairy outbreak as a testing ledger: it is confident pasteurization inactivates H5N1 and that the commercial pasteurized supply is safe, with 464 products sampled and none carrying viable virus. Retail surveys found genetic fragments in roughly a fifth of samples but no live virus in any — fragments the agency is explicit are not infectious virus — while raw, unpasteurized milk it treats as a separate, higher-risk category. The tension the dossier holds is exactly this: a virus watched more closely than almost any other, and a crossing that the sources, on every dated snapshot, record as not yet confirmed. **Source trail:** [ECDC — Avian influenza overview (EU/EEA surveillance and risk assessment)]() (`h5n1-ecdc-overview`); [FDA — Investigation of Avian Influenza H5N1 Virus in Dairy Cattle]() (`h5n1-fda-milk`); [CDC — Technical Report: June 2024 Highly Pathogenic Avian Influenza A(H5N1) Viruses]() (`h5n1-cdc-technical`) #### Visual provenance - Caption: The register the file keeps: risk read by exposure, both halves attributed. - Alt text: Data surface: risk low for the general public and higher for those occupationally exposed. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ## Actors and positions ### CDC and US state health departments - Role: Lead US human-health surveillance for avian influenza. - Confidence: high - Position: General-public risk is low; elevated risk is occupational, rated moderate-to-high for those in contact with infected animals; no US human-to-human spread identified; exposed workers are monitored. - Supporter framing: Public-health officials emphasize that the dual framing is internally consistent and matches WHO, and that active monitoring is why a human link would be caught early. - Opposing account: Some public-health voices argue the 'low risk' messaging understates preparedness urgency and that farm-worker surveillance has gaps; others argue public alarm is disproportionate to what remains overwhelmingly an animal problem. - Independent assessment: The dual framing is consistent with WHO and ECDC; the confirmed US count is a floor rather than a settled total, given testing gaps. **Source trail:** [CDC — A(H5) Bird Flu Situation Summary (with human-monitoring page)]() (`h5n1-cdc-situation`); [CDC — Technical Report: June 2024 Highly Pathogenic Avian Influenza A(H5N1) Viruses]() (`h5n1-cdc-technical`) #### Portrait provenance - Caption: CDC's ledger: a low-risk assessment paired with active monitoring. - Alt text: Data surface: the US human case ledger. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### USDA APHIS - Role: Lead authority for the animal side; confirms and tracks HPAI in livestock and poultry. - Confidence: high - Position: The priority is controlling the animal outbreak; it keeps a rolling public table of confirmed livestock cases, with nineteen states affected since March 2024 by mid-December 2025. - Supporter framing: Animal-health officials frame the dashboard as the authoritative, business-day-updated record of where the virus is in livestock. - Opposing account: Some dairy-industry and worker advocates say the federal response was slow and early testing patchy; some producers resisted mandatory testing on economic and privacy grounds. - Independent assessment: APHIS figures are the authoritative animal-outbreak metric and are distinct from human case counts — the two must not be conflated. The dashboard was unreachable during part of this reporting. **Source trail:** [USDA APHIS — HPAI Detections in Livestock (dairy-herd tracker)]() (`h5n1-usda-aphis`) #### Portrait provenance - Caption: APHIS keeps the animal ledger no one else does. - Alt text: Data surface: infected US dairy herds across nineteen states. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### FDA - Role: Regulates the human food supply during the cattle outbreak. - Confidence: high - Position: Pasteurization inactivates H5N1, the commercial pasteurized supply is safe, and retail sampling found no viable virus; it cautions against raw, unpasteurized milk, which may carry viable virus. - Supporter framing: Food-safety officials frame the position as well-evidenced, with the raw-milk caution a narrow, evidence-based distinction rather than a blanket 'food supply unsafe' claim. - Opposing account: Raw-milk advocates dispute the need to avoid unpasteurized products; separately, early RNA-fragment detections in retail samples fueled confusion, since fragments are not live virus. - Independent assessment: The position is well-evidenced; the retail-fragment finding is consistent with pasteurization inactivating the virus, and the raw-milk caution is specific rather than general. **Source trail:** [FDA — Investigation of Avian Influenza H5N1 Virus in Dairy Cattle]() (`h5n1-fda-milk`) #### Portrait provenance - Caption: FDA's ledger: a testing record, not a food scare. - Alt text: Data surface: pasteurized milk sampling found no viable virus. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### WHO, WOAH and FAO - Role: Global One Health surveillance across animal and human health; WHO keeps the cumulative global human tally. - Confidence: high - Position: Clade 2.3.4.4b is an unprecedented panzootic and a growing zoonotic-spillover risk, but overall A(H5) public-health risk is assessed low with no evidence of human-to-human transmission to date; surveillance and preparedness are warranted. - Supporter framing: The agencies frame sustained transmission consistently as absent rather than impossible, and warn against language that reads as forecasting a pandemic that has not occurred. - Opposing account: Some virologists call 'low risk' too reassuring given the scale of mammalian spillover; others caution against alarmist framing that treats an animal panzootic as an imminent human pandemic. - Independent assessment: WHO consistently frames sustained transmission as unconfirmed, not impossible; the animal panzootic is real and large, while the human signal remains sporadic and exposure-linked. **Source trail:** [WHO Global Influenza Programme — Cumulative number of confirmed human cases of avian influenza A(H5N1), 2003 onward]() (`h5n1-who-cumulative`); [WHO Regional Office for the Western Pacific — Avian Influenza Weekly Update (Western Pacific)]() (`h5n1-who-wpro`); [WOAH (World Organisation for Animal Health) — High Pathogenicity Avian Influenza Situation Report 78]() (`h5n1-woah-sr78`) #### Portrait provenance - Caption: WHO holds the world's human tally; WOAH holds the animal one. - Alt text: Data surface: the global cumulative human H5N1 ledger. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### Dairy and poultry farms and their workers - Role: The front line of occupational exposure, where nearly all confirmed US infections occurred. - Confidence: high - Position: Workers face direct exposure to infected animals, milk and culling; access to protective equipment, testing and monitoring varies, and economic pressures affect willingness to test animals and report illness. - Supporter framing: Producers cite the cost of full protective-equipment compliance and testing; worker advocates stress that this group carries the materially higher risk the 'low public risk' headline does not capture. - Opposing account: Some producers resisted testing on economic and privacy grounds; advocates note economic and immigration-status fears that may deter worker testing and reporting. - Independent assessment: CDC's assessment places nearly all confirmed US infections in people with direct dairy or poultry exposure (67 of 70 in one reading), making occupational exposure the central human-risk factor. Individuals are never named; the framing is occupational, not personal. **Source trail:** [CDC — A(H5) Bird Flu Situation Summary (with human-monitoring page)]() (`h5n1-cdc-situation`) #### Portrait provenance - Caption: The occupational front line is where nearly all confirmed human infections occurred; workers are framed as a group, never named. - Alt text: A hen at a poultry farm. - Credit: Government of South Australia - Rights / license: CC0, via Wikimedia Commons - Asset: [View image]() - Original / provenance: [Open source]() ## Claims and evidence ### H5N1 is already a human pandemic. - Claimant: Alarm-driven public framing - Evidence status: disputed - Counterclaim: Per CDC and WHO, human infections remain sporadic and tied to animal exposure; human-to-human transmission has not been identified — the defining feature a pandemic influenza would require. - Independent assessment: No public-health authority classifies H5N1 as a human pandemic. The absence of confirmed sustained transmission is a statement about current evidence, not a guarantee about the future. **Source trail:** [CDC — A(H5) Bird Flu Situation Summary (with human-monitoring page)]() (`h5n1-cdc-situation`); [WHO Regional Office for the Western Pacific — Avian Influenza Weekly Update (Western Pacific)]() (`h5n1-who-wpro`) #### Visual provenance - Caption: The 'pandemic' claim collapses the moment the three ledgers are kept apart. - Alt text: Data surface: three separate ledgers for human cases, animal outbreaks and surveillance effort. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original sources linked - Asset: [View image]() - Original / provenance: [Open source]() ### The risk of H5N1 to the general public is low. - Claimant: CDC, WHO and ECDC - Evidence status: confirmed - Counterclaim: The same authorities pair it with an occupational caveat: CDC rates the risk moderate-to-high for those in contact with infected animals. - Independent assessment: Confirmed as the current assessment for the general public, and it must be read together with the occupational caveat. Both are official and simultaneously true for their respective populations. **Source trail:** [CDC — A(H5) Bird Flu Situation Summary (with human-monitoring page)]() (`h5n1-cdc-situation`); [ECDC — Avian influenza overview (EU/EEA surveillance and risk assessment)]() (`h5n1-ecdc-overview`); [CDC — Technical Report: June 2024 Highly Pathogenic Avian Influenza A(H5N1) Viruses]() (`h5n1-cdc-technical`) #### Visual provenance - Caption: 'Low risk' is true for the public and incomplete without the occupational half. - Alt text: Data surface: low risk for the general public, higher for the occupationally exposed. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### The milk and food supply is generally unsafe because of H5N1. - Claimant: Overbroad public reading of the dairy outbreak - Evidence status: disputed - Counterclaim: FDA studies indicate pasteurization inactivates H5N1 and that sampled pasteurized products contained no viable virus; RNA fragments are not infectious virus. - Independent assessment: Overbroad and not supported. The genuine, narrower caution is against raw, unpasteurized milk. This dossier gives no food-safety advice — consult FDA directly. **Source trail:** [FDA — Investigation of Avian Influenza H5N1 Virus in Dairy Cattle]() (`h5n1-fda-milk`) #### Visual provenance - Caption: The 'food is unsafe' claim is overbroad; the real caution is narrow and about raw milk. - Alt text: Data surface: pasteurized products sampled, none carrying viable virus. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### Nearly all confirmed US human cases were in people with direct animal exposure, and the confirmed count likely undercounts true infections. - Claimant: CDC data and public-health analysts - Evidence status: likely - Counterclaim: The precise scale of undetected infection is not established, so the undercount is a likelihood rather than a measured figure. - Independent assessment: The exposure pattern is confirmed by CDC data (67 of 70 had dairy or poultry exposure in one reading). The undercount is likely rather than proven: farm-worker testing gaps make confirmed cases a floor, but the true scale of undetected infection is not known. **Source trail:** [CDC — A(H5) Bird Flu Situation Summary (with human-monitoring page)]() (`h5n1-cdc-situation`) #### Visual provenance - Caption: Exposure pattern confirmed; the undercount is a likelihood, not a measured number. - Alt text: Data surface: US human cases concentrated in animal-exposed workers. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ## Language record ### CDC - Role: A(H5) Bird Flu Situation Summary - Context: The core absence the whole file turns on, dated to the summary's access date. Quotation text is available in the web edition and the cited original source; it is not republished in this machine-readable edition. **Source:** [CDC — A(H5) Bird Flu Situation Summary (with human-monitoring page)]() (`h5n1-cdc-situation`) ### CDC - Role: A(H5) Bird Flu Situation Summary - Context: The low-risk assessment paired, in the same sentence, with active monitoring. Quotation text is available in the web edition and the cited original source; it is not republished in this machine-readable edition. **Source:** [CDC — A(H5) Bird Flu Situation Summary (with human-monitoring page)]() (`h5n1-cdc-situation`) ### WHO Regional Office for the Western Pacific - Role: Avian Influenza Weekly Update - Context: The regional bulletin's bottom line for the 5-18 June 2026 window. Quotation text is available in the web edition and the cited original source; it is not republished in this machine-readable edition. **Source:** [WHO Regional Office for the Western Pacific — Avian Influenza Weekly Update (Western Pacific)]() (`h5n1-who-wpro`) ### WHO Regional Office for the Western Pacific - Role: Avian Influenza Weekly Update - Context: Elevated animal threat, unchanged overall pandemic risk — held in the same paragraph. Quotation text is available in the web edition and the cited original source; it is not republished in this machine-readable edition. **Source:** [WHO Regional Office for the Western Pacific — Avian Influenza Weekly Update (Western Pacific)]() (`h5n1-who-wpro`) ### ECDC - Role: Avian influenza overview - Context: The European agency's framing, matching CDC and WHO on the central absence. Quotation text is available in the web edition and the cited original source; it is not republished in this machine-readable edition. **Source:** [ECDC — Avian influenza overview (EU/EEA surveillance and risk assessment)]() (`h5n1-ecdc-overview`) ### FDA - Role: Investigation of H5N1 in Dairy Cattle - Context: The food-safety conclusion, kept distinct from the separate raw-milk caution. Quotation text is available in the web edition and the cited original source; it is not republished in this machine-readable edition. **Source:** [FDA — Investigation of Avian Influenza H5N1 Virus in Dairy Cattle]() (`h5n1-fda-milk`) ### CDC - Role: June 2024 technical report - Context: Adaptation markers reported without being inflated into a transmissibility claim; figures here await cross-verification. Quotation text is available in the web edition and the cited original source; it is not republished in this machine-readable edition. **Source:** [CDC — Technical Report: June 2024 Highly Pathogenic Avian Influenza A(H5N1) Viruses]() (`h5n1-cdc-technical`) ## Timeline ### 2024-03-25 — First H5N1 case confirmed in US dairy farmworker — novel spillover route - Event type: outbreak\_start - Confidence: high CDC confirmed the first H5N1 case linked to the US dairy cattle outbreak. This marked the first detection of H5N1 in US dairy herds and the first confirmed human spillover from cattle, as opposed to poultry, representing a novel epidemiological development. **Source trail:** [CDC — H5 Bird Flu: Current Situation — CDC]() (`src-h5n1-cdc`) ### 2024-12-01 — Severe H5N1 case in California teenager — first in US without identified exposure - Event type: outbreak\_update - Confidence: high CDC reported a severe H5N1 case in a California teenager with no identified animal exposure, prompting intensive investigation. The patient required hospitalization. No secondary cases were identified. The source of exposure was not determined. **Source trail:** [CDC — H5 Bird Flu: Current Situation — CDC]() (`src-h5n1-cdc`); [WHO — H5N1 Influenza — WHO Global Surveillance]() (`src-h5n1-who`) ### 2026-04-15 — WHO: enhanced surveillance active in 34 countries; no H2H transmission confirmed - Event type: outbreak\_update - Confidence: high WHO's April 2026 update confirmed enhanced H5N1 surveillance in 34 countries. Total confirmed human cases since 2024 cluster: 127. No sustained human-to-human transmission has been detected. WHO risk level remains 'low to the general population, higher for occupational exposure'. **Source trail:** [WHO — H5N1 Influenza — WHO Global Surveillance]() (`src-h5n1-who`) ## Visual essay ### Gallery image 01 #### Visual provenance - Caption: A US dairy herd (context image, Michigan). The cattle outbreak is documented by USDA APHIS; these animals are not identified as infected. - Alt text: Dairy cattle feeding at a farm in Michigan. - Credit: Dwight Burdette - Rights / license: CC BY 3.0, via Wikimedia Commons - Asset: [View image]() - Original / provenance: [Open source]() ### Gallery image 02 #### Visual provenance - Caption: Poultry as context: the animal outbreak is overwhelmingly a bird story, with millions culled month to month. This bird is not identified as infected. - Alt text: A hen at a poultry farm. - Credit: Government of South Australia - Rights / license: CC0, via Wikimedia Commons - Asset: [View image]() - Original / provenance: [Open source]() ### Gallery image 03 #### Visual provenance - Caption: The panzootic in public space: an avian-flu warning sign at a wild-bird reserve, where the outbreak is most visible to the public. - Alt text: An avian influenza warning sign at a nature reserve. - Credit: Crep171166 - Rights / license: CC BY-SA 4.0, via Wikimedia Commons - Asset: [View image]() - Original / provenance: [Open source]() ## Linked visual references ### Public Health Image Library — avian influenza - Photographer: Cynthia Goldsmith, Frederick A. Murphy (CDC) - Publisher: CDC Public Health Image Library - Recognition: Public-domain federal image bank - Why it matters: The federal image bank supplies the rights-clean virus micrographs this dossier uses, so the visual layer never depends on hotlinked or unlicensed imagery. - Original: [Open reference]() #### The virus is a specimen, not a scene. This is a laboratory record, not front-line photojournalism. The dossier keeps the virus imagery clearly dated and captioned so a 1997-era specimen is never mistaken for a picture of the 2024-25 cattle clade. A disease dossier has no battlefield to photograph. Its evidence lives in ledgers and in the laboratory, so the visual desk leans on public-domain micrographs from the federal image bank and on our own re-typeset data surfaces rather than on staged scenes. The rule here is captioning discipline. A virus particle photographed decades ago is a true image of H5N1 and a false image of any specific outbreak. Every micrograph is labeled as a specimen so the picture illustrates the subject without pretending to document a moment. ## Media desk ### The cattle host - Publisher: Wikimedia Commons - Creator: Dwight Burdette - Date: Context image - Media type: photo - Rights mode: direct\_image - Placement: Animal ledger / dairy - Caption: The 2024 jump into dairy cattle gave H5N1 a mammalian host on a scale it had never held before. - Why it matters: The cattle outbreak is the reason the animal ledger now moves faster than any other column in this file. The cattle image belongs near the animal ledger because the dairy jump is what made 2024 different. A bird disease reaching a mammal kept close to people is exactly the kind of change surveillance exists to catch. The photograph is context, not evidence of an infected herd; the herd counts live in the USDA and CDC data surfaces beside it. - Original: [Open media record]() #### Visual provenance - Caption: A US dairy herd as context. Since March 2024 the virus has jumped into cattle — a novel host — but these specific animals are not identified as infected. - Alt text: Dairy cattle at a Michigan farm. - Credit: Dwight Burdette - Rights / license: CC BY 3.0, via Wikimedia Commons - Asset: [View image]() - Original / provenance: [Open source]() ### The bird ledger - Publisher: Wikimedia Commons - Creator: Government of South Australia - Date: Context image - Media type: photo - Rights mode: direct\_image - Placement: Animal ledger / poultry - Caption: The poultry column is measured in millions per month; it must never be summed with the decade-long total or with any human count. - Why it matters: It anchors the WOAH figures visually while keeping the bird ledger separate from the human one. Poultry is where the panzootic actually lives. The bird ledger is enormous and fast-moving, which is exactly why it must be kept in its own column: the scale of animal loss says nothing about human transmission. The photograph is a stand-in for a system counted in the WOAH report, not a picture of a specific outbreak. - Original: [Open media record]() #### Visual provenance - Caption: Poultry carry the largest animal ledger: millions of birds die or are culled month to month. This bird is context, not identified as infected. - Alt text: A hen at a poultry farm. - Credit: Government of South Australia - Rights / license: CC0, via Wikimedia Commons - Asset: [View image]() - Original / provenance: [Open source]() ### HPAI Detections in Livestock - Publisher: USDA APHIS - Creator: USDA Animal and Plant Health Inspection Service - Date: Rolling dashboard - Media type: dashboard - Rights mode: linked\_reference\_only - Placement: Animal ledger / primary source - Caption: The APHIS livestock dashboard is the animal ledger no one else keeps; it refreshes on business days and was unreachable during part of this reporting. - Why it matters: It is the authoritative animal-outbreak source, linked rather than re-hosted, with a captured access date. The dashboard belongs in the visual desk as a primary source the reader can inspect, not as a picture we re-host. Because it moves and was intermittently unreachable, the dossier prints a verified floor from peer-reviewed and veterinary sources and flags the higher newspaper figure as unverified against it. - Original: [Open media record]() #### Visual provenance - Caption: Our re-typeset reading of the verified herd floor, with the unverifiable higher figure flagged rather than adopted. - Alt text: Data surface: more than a thousand infected US dairy herds across nineteen states. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### Cumulative confirmed human H5N1 cases, 2003 onward - Publisher: WHO Global Influenza Programme - Creator: WHO/GIP - Date: Data as of 8 May 2026 - Media type: infographic - Rights mode: linked\_reference\_only - Placement: Human ledger / global - Caption: WHO's cumulative table is the global human ledger; it is overwritten in place, so every figure is cited to its printed data date. - Why it matters: It supplies the worldwide human total that anchors the 'thousand cases in twenty-three years' frame. WHO material is not open-licensed, so the dossier rebuilds the table as its own re-typeset surface from the verified numbers and credits the source. The rule is to cite the printed 'data in HQ as of' line, because the same file has read 993, then 997, then 1,000 across a single year of revisions. - Original: [Open media record]() #### Visual provenance - Caption: Rebuilt from the verified WHO figures rather than re-hosting the source PDF, credited to WHO/GIP with its printed data date. - Alt text: Data surface: 1,000 confirmed human H5N1 cases and 479 deaths worldwide since 2003. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ## Source readings ### Seventy-one, counted two ways, and a public risk called low. - Registry ID: `h5n1-cdc-situation` - Publisher: CDC - Source type: official\_position - Published: 2026-03-06 - Registry title: A(H5) Bird Flu Situation Summary (with human-monitoring page) - Editorial note: Anchor US human-case count and monitoring figures; a dynamic page captured on the access date. - Original: [Open source]() CDC's summary anchors the US human ledger — and keeps the watching carefully separate from the infected. CDC records 71 human A(H5) cases in the United States since February 2024: seven caught by national flu surveillance, sixty-four by monitoring people who worked near infected animals. On the same page it calls the public-health risk low and says no person-to-person spread has been confirmed with the H5N1 viruses circulating in birds. That last line is written as an absence of confirmation as of the stated date, not as a claim that such spread cannot happen. A companion page logs at least 33,100 people monitored after animal exposure — an effort metric, not a count of infections. The confirmed case number is best read as a floor, given known farm-worker testing gaps. #### Takeaways - Anchor source for the US human-case count. - Confirmed cases are a floor, not a ceiling. - Monitoring figures are surveillance effort, never merged with cases. #### Visual provenance - Caption: The US human ledger, read the way CDC writes it: a count caught two ways, and an absence of confirmed spread. - Alt text: Data surface: 71 US human A(H5) cases, seven via flu surveillance and sixty-four via monitoring, with no confirmed person-to-person chain. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### The barn ledger no one else keeps. - Registry ID: `h5n1-usda-aphis` - Publisher: USDA APHIS - Source type: official\_position - Published: 2025-12-16 - Registry title: HPAI Detections in Livestock (dairy-herd tracker) - Editorial note: Animal-outbreak ledger; rolling official dashboard, unreachable during part of this reporting. - Original: [Open source]() USDA APHIS records the animal side one business day at a time; the human toll is a separate, far shorter column. The animal side is a different ledger with a different shape. Peer-reviewed work published in a CDC journal in January 2026 logs more than a thousand H5N1-infected dairy herds across the United States, most concentrated in California; the American Veterinary Medical Association's tracker lists nineteen states with H5N1 confirmed in dairy cattle. A June 2026 newspaper reading of USDA's live dashboard put the total higher — 1,154 herds, with forty new Idaho detections in a trailing month — but those figures come from the newspaper, not the agency, and could not be verified: the APHIS dashboard was unreachable, and the article contradicts itself on whether nineteen or twenty states are affected. The verified floor is what stands. #### Takeaways - Authoritative animal-outbreak ledger, distinct from human cases. - Verified floor: more than a thousand herds, nineteen states. - Higher newspaper figure flagged as unverified, not adopted. #### Visual provenance - Caption: The barn ledger, held to a verified floor while a higher unverifiable figure is flagged rather than adopted. - Alt text: Data surface: more than a thousand infected US dairy herds across nineteen states. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### A thousand cases in twenty-three years. - Registry ID: `h5n1-who-cumulative` - Publisher: WHO Global Influenza Programme - Source type: official\_position - Published: 2026-05-08 - Registry title: Cumulative number of confirmed human cases of avian influenza A(H5N1), 2003 onward - Editorial note: Global human-case tally; a table WHO overwrites in place, cited to its printed data date. - Original: [Open source]() WHO's cumulative table lengthens the human ledger without accelerating it. WHO's cumulative table counts every laboratory-confirmed human H5N1 case reported since 2003. As of the data date printed on the current version, 8 May 2026, the total is 1,000 cases and 479 deaths across twenty-five reporting countries. It is a rolling document overwritten in place — the figure moved from 993 to 997 to 1,000 across three 2026 revisions — so any number is cited to the printed 'data in HQ as of' line. Each entry is a single laboratory-confirmed detection, some of them asymptomatic, counted by the country that reported it. The often-quoted case-fatality figure near 48 percent is arithmetic on the two columns; WHO does not print a fatality rate on the table itself. #### Takeaways - Anchor for the worldwide human total. - Cite the printed data date, not the file name. - The ~48% fatality figure is arithmetic, not a WHO-printed rate. #### Visual provenance - Caption: The world's human ledger since 2003, with the case-fatality figure marked as arithmetic rather than a rate WHO prints. - Alt text: Data surface: 1,000 confirmed human H5N1 cases and 479 deaths worldwide since 2003. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### The fortnight the crossing did not happen. - Registry ID: `h5n1-who-wpro` - Publisher: WHO Regional Office for the Western Pacific - Source type: official\_position - Published: 2026-06-19 - Registry title: Avian Influenza Weekly Update (Western Pacific) - Editorial note: Fortnightly regional surveillance bulletin; reporting window 5-18 June 2026. - Original: [Open source]() A single reporting window reads as routine surveillance, not emergency. In WHO's Western Pacific bulletin for 5 to 18 June 2026, no new human H5N1 case was reported to the region; the last one traced to Svay Rieng Province, Cambodia, with symptom onset on 15 April 2026. The only new human avian-influenza infections that fortnight were two children with H9N2, a generally milder virus, one in Guangxi and one in Hong Kong, both linked to poultry and neither to another person. The cumulative regional H5N1 toll since 2003 stands at 485 cases and 320 deaths across six countries; the global toll, 1,000 and 479. WHO's bottom line is stated as an absence: no sustained human-to-human transmission has been identified, and sustained spread is currently considered unlikely, while the zoonotic threat remains elevated because the viruses keep spreading among birds. #### Takeaways - A routine fortnight, not an emergency spike. - Human and animal signals kept separate. - Absence of confirmed spread, stated as unlikely — not impossible. #### Visual provenance - Caption: The watching, read as effort: tens of thousands monitored so that a single human link would be seen. - Alt text: Data surface: at least 33,100 people monitored and 1,340 tested after animal exposure — effort, not infections. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### The panzootic, counted where it still lives. - Registry ID: `h5n1-woah-sr78` - Publisher: WOAH (World Organisation for Animal Health) - Source type: official\_position - Published: 2026-01-15 - Registry title: High Pathogenicity Avian Influenza Situation Report 78 - Editorial note: Intergovernmental animal-health surveillance; month covered December 2025. - Original: [Open source]() WOAH tallies the outbreak in animals, where the numbers are largest and least ambiguous. WOAH's December tally counts the outbreak in animals: 169 new poultry outbreaks and 608 in wild birds and mammals across four continents, with some 6.4 million birds dead or culled in the month and four mammal detections in Germany and Estonia. This is surveillance in animals, not a human pandemic; human cases sit outside WOAH's remit. The single-month figure is not to be summed with the decade-long context, which exceeds 633 million birds lost between 2005 and 2024 and peaked near 146 million in 2022. For human numbers, the report defers to WHO. #### Takeaways - Largest, clearest ledger is the animal one. - Never blend a single month with the decade total. - Human numbers belong to WHO, not WOAH. #### Visual provenance - Caption: The poultry ledger, with the single month held strictly apart from the decade-long total. - Alt text: Data surface: about 6.4 million poultry dead or culled in December 2025 against a long-run loss above 633 million birds. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### A testing ledger, not a food scare. - Registry ID: `h5n1-fda-milk` - Publisher: FDA - Source type: official\_position - Published: 2025-03-14 - Registry title: Investigation of Avian Influenza H5N1 Virus in Dairy Cattle - Editorial note: Food-safety surveillance; page current as of 14 March 2025. - Original: [Open source]() FDA files the dairy outbreak as pasteurization data, with a narrow, evidence-based caution about raw milk. FDA reports 464 pasteurized products sampled, none carrying viable virus, and two retail surveys — of 297 and 167 samples — that found genetic fragments in roughly a fifth but no live virus in any. It is explicit that PCR fragments are not infectious virus. The agency treats raw, unpasteurized milk as a separate, higher-risk category whose human transmissibility it says is not yet known. This dossier gives no food-safety advice; the distinction here is between a broad 'food is unsafe' claim, which the data do not support, and a narrow raw-milk caution, which they do. #### Takeaways - Pasteurized sampling found no viable virus. - PCR fragments are not live virus. - Raw milk is a separate, higher-risk category — consult FDA. #### Visual provenance - Caption: The food-safety ledger, drawn as a testing record with fragments held distinct from live virus. - Alt text: Data surface: 464 pasteurized products sampled with no viable virus; retail fragments are not infectious virus. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### Risk tracks the barn door, not the border. - Registry ID: `h5n1-ecdc-overview` - Publisher: ECDC - Source type: official\_position - Published: 2026-06-26 - Registry title: Avian influenza overview (EU/EEA surveillance and risk assessment) - Editorial note: EU/EEA risk assessment; March-May 2026 overview, published 26 June 2026. - Original: [Open source]() ECDC keeps avian flu framed as surveillance, splitting the risk by exposure rather than by place. Assessing the A(H5N1) clade circulating in Europe, ECDC rates the risk low for the general public and low-to-moderate for those occupationally or otherwise exposed to infected animals, and states that no sustained human-to-human transmission has been documented. Its count of nineteen human avian-influenza cases between 28 February and 4 June 2026 is a worldwide, multi-subtype tally across six countries; only one — an imported H9N2 case in Italy — was in the EU. That figure must never be read as a European total. #### Takeaways - Risk tracks exposure, not geography. - The 19-case count is global and multi-subtype, not European. - No sustained human-to-human transmission documented. #### Visual provenance - Caption: The risk read the way the agencies write it: split by exposure, not by geography. - Alt text: Data surface: risk low for the general public and higher for those occupationally exposed to infected animals. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### The virus, read letter by letter. - Registry ID: `h5n1-cdc-technical` - Publisher: CDC - Source type: research - Published: 2024-06-05 - Registry title: Technical Report: June 2024 Highly Pathogenic Avian Influenza A(H5N1) Viruses - Editorial note: Genomic-surveillance report. Second-pass verification missing — figures keyed here await cross-verification. - Original: [Open source]() CDC's June 2024 genomic report flags mammalian-adaptation markers — and still records no human-to-human transmission. The report flags mammalian-adaptation markers in dairy-worker infections yet records that the changes have not been associated with enhanced transmissibility to humans, with general-public risk still called low. The three 2024 cases it describes are a June-2024 count, not a current total. This is the one reading in the file whose second-pass verification is missing, so its specific genetic figures are treated as awaiting cross-verification rather than settled. It is kept for the discipline it models: adaptation markers noticed and reported without being inflated into a transmissibility claim. #### Takeaways - Adaptation markers noted; transmissibility not enhanced to humans. - Occupational cases, not a general-public signal. - Figures here await cross-verification. #### Visual provenance - Caption: H5N1 virus particles (laboratory specimen). The genomic report reads the virus letter by letter; its figures here await cross-verification. - Alt text: Electron micrograph of H5N1 avian influenza A virus particles. - Credit: NIAID - Rights / license: Public domain, via Wikimedia Commons - Asset: [View image]() - Original / provenance: [Open source]() ## Analysis shelf ### A(H5) Bird Flu Situation Summary - Publisher: CDC - Type: official page - Why it matters: The anchor US human-case and monitoring source; a dynamic page best read with a captured access date. - Position note: Official government surveillance; risk assessment stated as low with an occupational caveat. - Original: [Open source]() #### Visual provenance - Caption: The US human ledger, read the way CDC writes it. - Alt text: Data surface: 71 US human A(H5) cases with no confirmed person-to-person chain. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### Cumulative confirmed human H5N1 cases, 2003 onward - Publisher: WHO Global Influenza Programme - Type: dataset - Why it matters: The worldwide human tally that anchors the long view; overwritten in place, so cite the printed data date. - Position note: Official global surveillance; a laboratory-confirmed count, not a pandemic toll. - Original: [Open source]() #### Visual provenance - Caption: The global human ledger since 2003. - Alt text: Data surface: 1,000 confirmed human H5N1 cases and 479 deaths since 2003. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ### Investigation of Avian Influenza H5N1 Virus in Dairy Cattle - Publisher: FDA - Type: official page - Why it matters: The food-safety ledger, with pasteurization testing and the raw-milk distinction kept separate. - Position note: Official food-safety regulator; no food advice is given here — consult FDA directly. - Original: [Open source]() #### Visual provenance - Caption: The food-safety ledger as a testing record. - Alt text: Data surface: pasteurized milk sampling found no viable virus. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ## Media shelf ### HPAI Situation Report 78 - Publisher: WOAH - Type: report - Why it matters: The animal-side tally that keeps the panzootic's scale visible without letting it read as a human count. - Position note: Intergovernmental animal-health surveillance; human cases sit outside its remit. - Original: [Open source]() #### Visual provenance - Caption: The panzootic is most visible to the public as warning signs around wild-bird sites. - Alt text: An avian influenza warning sign at a nature reserve. - Credit: Crep171166 - Rights / license: CC BY-SA 4.0, via Wikimedia Commons - Asset: [View image]() - Original / provenance: [Open source]() ### Avian influenza overview (EU/EEA) - Publisher: ECDC - Type: report - Why it matters: The European risk assessment that splits the risk by exposure and warns against reading its case count as a regional total. - Position note: Official EU public-health agency; risk framed low for the public, higher for the exposed. - Original: [Open source]() #### Visual provenance - Caption: ECDC's split: exposure, not geography. - Alt text: Data surface: risk low for the general public, higher for the occupationally exposed. - Credit: Totally Fine Foundation - Rights / license: Project editorial graphic; original source linked - Asset: [View image]() - Original / provenance: [Open source]() ## Open questions - Refresh every rolling figure at publication day: the CDC summary (71) and monitoring pages (33,100 / 1,340), the WHO cumulative table (1,000 / 479 as of 8 May 2026), and the WHO Western Pacific weekly bulletin all move — re-fetch and re-date each. - Close the two content-filter gaps: obtain a primary peer-reviewed science reading on virology and adaptation markers, and a second-pass verification of the CDC June 2024 technical report before any figure keyed to it ships in published copy. - Fetch the APHIS livestock dashboard directly to replace the unverifiable newspaper herd and state figures (1,154 herds; 40 Idaho) with a verbatim primary reading and a captured access date; resolve the 19-vs-20-state conflict. - Keep the animal (herd and flock) panel visually separate from the human-case panel so the two ledgers never read as one, and keep 'monitored / tested' labeled as surveillance effort, not infections. - Preserve the 'watched, not crossed' nuance in headline and deck: no pandemic forecasting, no stigma, both halves of the risk split, and every figure attributed and dated. ## Source registry - `h5n1-cdc-situation` — [CDC — A(H5) Bird Flu Situation Summary (with human-monitoring page)](); official\_position; 2026-03-06 - `h5n1-usda-aphis` — [USDA APHIS — HPAI Detections in Livestock (dairy-herd tracker)](); official\_position; 2025-12-16 - `h5n1-who-cumulative` — [WHO Global Influenza Programme — Cumulative number of confirmed human cases of avian influenza A(H5N1), 2003 onward](); official\_position; 2026-05-08 - `h5n1-who-wpro` — [WHO Regional Office for the Western Pacific — Avian Influenza Weekly Update (Western Pacific)](); official\_position; 2026-06-19 - `h5n1-woah-sr78` — [WOAH (World Organisation for Animal Health) — High Pathogenicity Avian Influenza Situation Report 78](); official\_position; 2026-01-15 - `h5n1-fda-milk` — [FDA — Investigation of Avian Influenza H5N1 Virus in Dairy Cattle](); official\_position; 2025-03-14 - `h5n1-ecdc-overview` — [ECDC — Avian influenza overview (EU/EEA surveillance and risk assessment)](); official\_position; 2026-06-26 - `h5n1-cdc-technical` — [CDC — Technical Report: June 2024 Highly Pathogenic Avian Influenza A(H5N1) Viruses](); research; 2024-06-05