Experts say this is the worst flu season in the U.S. in more than a decade and cases are still trending up. Flu infections have reached the highest level since the winter of 2010 and 2011 when the ...

The US is dealing with an unusually intense influenza outbreak that has infected between 29 and 51 million people and hospitalized up to 820,000 since October.

In this case, flu A viruses have learned to mutate to stay alive longer, which in turn makes it more likely that you (and everyone around you) gets infected. “With a change in genome ...

For a second time this season, at least 41 states are reporting high or very high levels of the flu. Here's how to stay safe.

Amidst surging respiratory illnesses and previously controlled diseases like tuberculosis making alarming comebacks, a new ...

This version of the virus is circulating broadly in wild birds and is different from the virus that has been causing dairy ...