How long are you contagious with the flu? Experts say you can spread the virus for five to seven days after symptoms start, ...

By Hugo Francisco de Souza A rare human challenge-style trial shows that even with poor ventilation and prolonged exposure, ...

A new nasal spray vaccine could stop bird flu at the door — blocking infection, reducing spread, and helping head off the next pandemic.

Here’s our weekly round-up of what illnesses are spreading the most in Metro Detroit communities, according to our local ...

Add Yahoo as a preferred source to see more of our stories on Google. Flu activity is rising sharply in the U.S. this season with at least 7.5 million estimated cases so far, largely due to a new ...

As migrating bird populations begin to travel through Colorado during late fall and winter, Colorado Parks and Wildlife expects an increase in wild birds infected with highly pathogenic avian ...

Since it was first detected in the U.S. in 2014, H5N1 avian influenza, commonly known as bird flu, has jumped from wild birds ...

Bird flu alert in India: Bihar is on alert after bird flu was confirmed in dead crows in Darbhanga. Authorities are ...

Bird flu (avian influenza) has been confirmed in Darbhanga, Bihar, after thousands of crows died, triggering high alert.

Two little-known animal viruses, influenza D and canine coronavirus, show signs of adapting to humans, according to experts.