Influenza A, B, C Or D? Flu spreads easily in winter due to crowded indoor spaces, low humidity, and reduced immunity.

NEW YORK (AP) — U.S. flu infections showed signs of a slight decline last week, but health officials say it’s not clear that ...

Is it flu A or flu B, and how long is it contagious? Here's what to know about the flu virus running rampant in Michigan.

But the most important difference between the two is that type A viruses can cause pandemics because of how often and quickly ...

The CDC estimated there have been at least 7.5 million illnesses in the U.S., 81,000 hospitalizations and 3,100 deaths from ...

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

As flu cases rise across the U.S., those who end up contracting the virus have treatments available that may help reduce ...

U.S. flu infections still are surging, and health officials say it's a severe season that's likely to get worse.

Plenty of people – about 1 in 3, according to some studies — feel bad for a day or two after they get a flu shot. The most common symptoms include headaches, muscle aches, fatigue and fever, all of ...

After reporting was delayed due to the holidays, new CDC data shows the flu is spreading, with 33,000 people hospitalized ...