Bird flu tracker,
live on one globe.
Where bird flu is spreading, what changed and how fast it is moving. Avos reads the world's health agencies and local press around the clock and tells you, in plain words.
H5N1 has been confirmed in 1,088 US dairy herds; Washington resident remains mildly ill
H5N1 has been confirmed in 1,088 US dairy herds; Washington resident remains mildly ill
H5N1 has been confirmed in 1,088 dairy cattle herds across 19 US states, according to a new study. Officials have confirmed infections in 93 US dairy herds so far in 2026.
Washington's first cattle detections remain in two quarantined Yakima County farms. A resident exposed to infected cows tested positive, is not seriously ill and is isolating at home. The public risk remains low.
Birds affected in US flocks, per week
Bird flu, as it happened.
October 2026
- 16FriA study reported H5N1 confirmed in 1,088 US dairy cattle herds across 19 states.This week
- 15ThuA Yakima County resident exposed to infected cows tested positive and is isolating at home.This week
- 13TueWashington confirmed H5N1 in dairy cattle at two Yakima County farms, its first cattle detection.This week
- 5Mon620,000 birds in 21 US flocks in 30 days; Minnesota hit hardest.United States
September 2026
- 27SunCambodia's sixth human case of 2026, a poultry worker.Cambodia
Bird flu, in brief.
High- Pathogen
- Influenza A(H5N1)
- Spreads by
- Close contact with infected birds, dairy cattle or their surroundings.
- Incubation
- 2 to 7 days.
- Risk
- Low for the general public, according to the CDC.
- Treatment
- Flu antivirals such as oseltamivir. H5 vaccines are stockpiled, not in general use.
- 1. Wild birdsDucks and geese carry it along their migration routes.
- 2. PoultryIt sweeps through farms and kills whole flocks.
- 3. Dairy cattleSince 2024 it also spreads in US dairy herds, through milk.
- 4. A few peopleFarm workers, by close contact. No spread between people so far.
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How this page is made.
The engine that writes Avos briefings, pointed at public health.
1. Read
Every six hours, Atlas, the Avos news engine, reads WHO's outbreak news, ECDC and the latest reporting on each outbreak.
2. Extract
A model updates every figure, place and date in a fixed form, only from what the sources say, and keeps the link to where it came from.
3. Check
New figures are compared with the last report. A figure that jumps or falls without explanation is held back and the last checked one stays.
This page reports what health agencies and journalists publish. Figures lag and get revised, and some places report little or nothing. It is not medical advice: for that, follow your local health authority.