Bird flu has been found in 16 flocks in 10 Pennsylvania counties this year. Here's where and how many birds have been affected.

Avian influenza poses a low risk to humans, the Centers for Disease Control and Prevention reports, but officials in Pennsylvania are not taking chances as cases appear in other states.

There are 70 confirmed cases of the bird flu among humans in the U.S., as of Tuesday. The CDC said the current public health risk is low.