What’s Happening with Dairy Cows and Bird Flu?

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…