In recent weeks, three human infections with the virus have been confirmed—all in dairy workers who had contact with sick cows. All three developed symptoms of eye infections known as conjunctivitis. The latest case, reported in Michigan this week, also involved respiratory symptoms more typical of a flu infection.

The FDA found pasteurized milk containing inactive bird flu virus remnants from infected dairy cows, but maintains the milk supply is safe.

Cows at two Texas dairy farms have contracted bird flu, marking the first known instance of the disease in livestock, amidst recovery from devastating wildfires.