Feeling under the weather? You could have Influenza Type A. Here's the difference between Influenza Type A and Type B.

Add Yahoo as a preferred source to see more of our stories on Google. A more severe and highly contagious new strain of the flu is circulating this season. It’s called subclade K, or more popularly ...

Flu cases and hospitalizations are surging, already breaking last season's records. Here's where activity is highest, what ...