Bird flu virus found in grocery store milk, but no risk to customers, FDA says

Samples of pasteurized milk on grocery store shelves have tested positive for remnants of the bird flu virus that has already infected herds of dairy cows, the U.S. Food and Drug Administration (FDA) said Tuesday.

The FDA stressed that the material is inactivated and that the findings "do not represent [an] actual virus that may be a risk to consumers." Officials added that they're continuing to study the issue.

Bird flu virus, known as Highly Pathogenic Avian Influenza (HPAI) or H5N1, is a disease that is highly contagious and often deadly in poultry. 

Infection with the virus causes decreased lactation, low appetite and other symptoms in affected cattle, the FDA says.