Watch: What we know about traces of H5N1 bird flu found in pasteurized milk

Genetic evidence of the H5N1 bird flu virus was found in grocery store milk in the United States this week, according to the Food and Drug Administration. The news follows the discovery that the avian flu has been detected in dairy cows.

But what do traces of virus in pasteurized milk mean for consumers? In this video, STAT explains what is known about the safety of milk on grocery shelves.