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University of Nebraska Medical Center

What’s Happening With Dairy Cows and Bird Flu

Johns Hopkins

The H5N1 strain of avian influenza—commonly known as bird flu—has been circulating among wild migratory birds for the past two years, with substantial spillover into poultry farms. 

But what’s sparking concern among scientists and public health officials alike is the recent discovery of the virus in dairy cows and the subsequent infection of a dairy farm employee—the second person in America ever documented to be infected with H5N1. The virus has now spread to 16 herds in six states according to the USDA, fueling concerns about potential further transmission to humans.

In this Q&A, adapted from the April 8 episode of Public Health On Call, Stephanie Desmon speaks with Meghan Davis, DVM, PhD ’12, MPH ’08, associate professor in Environmental Health and Engineering, and Andrew Pekosz, PhD, professor in Molecular Microbiology and Immunology, about H5N1’s jump between species, what that means for the virus’s pandemic potential, and what the appearance of the virus in dairy means for consumers.

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