A Yakima County, Washington, resident has died from complications of avian influenza after exposure at a dairy where cattle were infected with H5N1, according to county health officials. The death is the first U.S. bird-flu death reported in a year, the Associated Press reported.
The person had underlying health conditions and had been hospitalized before dying on Sunday. Yakima County officials did not release further details about the patient.
H5N1 confirmed in the case
The U.S. Centers for Disease Control and Prevention said the person was infected with H5N1, the avian influenza strain that has spread among wild birds, poultry, cattle and other animals for several years. Concerns grew in early 2024 when infections were identified in U.S. livestock.
Yakima County health officials have reported that 33 dairy herds in the area recently tested positive for H5N1. Three human infections have been linked to dairy exposure, and the Yakima Health District is working with the state health department to identify people who were in close contact with those cases and monitor them for symptoms.
Officials said the person who died had been exposed at a dairy with infected cattle. The case illustrates how the continuing presence of the virus in animal populations can create opportunities for occupational exposure, particularly for people who work directly with livestock.
What the U.S. case count shows
More than 70 human infections have been reported in the United States since the beginning of 2024, according to the CDC. The newly reported death is one of three U.S. deaths tied to bird flu since the outbreak became a major national public-health concern in 2024.
The first of those deaths was announced in January 2025 and involved an elderly person in Louisiana who had H5N1. A second Washington state death, reported in November 2025, involved the rarer H5N5 variant. The latest case has been identified as H5N1.
Those events underscore that severe outcomes can occur, especially in people who may have other health vulnerabilities, while also showing that the reported U.S. infections remain concentrated around known animal exposures rather than sustained transmission among people.
CDC says genetic analysis found no concerning change
A CDC spokesperson said the agency analyzed the genetic sequence of the virus from the Washington patient. The analysis found no changes that would make the virus spread more easily or cause more severe illness.
The agency continues to say there is no known person-to-person spread and that the risk to the general public is low. That assessment is important because the spread of H5N1 across animal species has prompted close scrutiny of whether the virus is changing in ways that could alter its risk to people.
The absence of an identified genetic change in this case does not remove the need for monitoring. It does, however, mean the available analysis did not find evidence that the virus in this patient had acquired features expected to make it more transmissible or more severe.
Exposure prevention remains central
Public-health officials continue to urge people who have contact with sick or dead birds to take precautions, including wearing respiratory protection. The same broad concern applies to people whose work puts them in close contact with potentially infected animals.
The continuing detection of H5N1 in dairy herds makes coordinated surveillance important for both animal and human health. In Yakima County, health authorities are tracing close contacts and monitoring them for symptoms while the state health department supports the local response.
For now, officials’ core message remains unchanged: H5N1 is a significant animal-health and occupational-exposure issue, but there is no known person-to-person spread and the CDC continues to assess the public’s overall risk as low.
This article is based on reporting by Medical Xpress. Read the original article.
Originally published on medicalxpress.com
