Washington Dairy Exposure Linked to First US Bird Flu Death of 2026

04 November 2026, Yakima, US: A Washington state resident died on November 1 after contracting H5N1 avian influenza through exposure to infected dairy cattle, the Yakima Health District said, marking the first human death from bird flu reported in the United States in 2026. The person had underlying health conditions and had been hospitalized before dying.

Dr. Dave Atteberry, health officer for the Yakima Health District, said avian influenza can cause severe illness, particularly among people with existing health conditions, but that the risk to the general public remains low. The district is working with the Washington State Department of Health to identify and monitor close contacts of people linked to the dairy exposure for symptoms.

Genetic sequencing confirmed the infection as H5N1, and the Washington State Department of Agriculture said sequencing from two Yakima County farms matched a cow-adapted strain that has circulated in US dairy herds since 2024. The agency found no evidence that the virus has adapted to spread more easily between mammals or between people, and no human-to-human transmission has been documented in the country.

Third human case tied to Yakima dairies

The fatal case is the third human H5N1 infection in Yakima County since mid-October, all linked to exposure at dairies with infected cows. A separate, third case involved a person with mild symptoms who was not hospitalized. Washington recorded its first cattle detections of the virus on October 8, when two Yakima County dairies tested positive; a dairy in neighboring Benton County tested positive later in October.

Herd counts vary slightly depending on the reporting date and agency. The Yakima County health dashboard, updated November 1, listed 33 infected herds in the county through October 29. The Washington State Department of Agriculture’s own tracker listed 39 infected Yakima County herds and one in Benton County through October 30, reflecting additional confirmations added after the county’s update.

Nationally, the Centers for Disease Control and Prevention’s most recent summary, posted October 15, counted 72 confirmed human H5N1 cases and two deaths in the United States since 2024, both of which predated the Washington case. The new death brings the national total to three fatalities linked to the virus since it began spreading in dairy cattle that year.

Health officials are advising people not to drink unpasteurized milk or eat unpasteurized dairy products made from cow or goat milk, a route of exposure they consider a key risk alongside direct contact with sick or dead animals. Farm workers handling livestock or poultry are considered at higher risk of infection than the general public, and officials have repeated guidance that such workers use respiratory and eye protection along with gloves when in contact with potentially infected animals.

The Yakima Health District said it continues to monitor the dairies linked to the confirmed human cases as testing of herds in the area continues.

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