Doctor visits for flu symptoms are at a 15-year high. Why is this flu season so bad? Doctors discuss flu trends, symptoms and how to stay safe.

To reduce the odds of catching the flu and colds, experts say consider tried-and-true prevention methods like hand washing and mask wearing.

Influenza levels in the US are the highest they've been in 15 years amid winter weather and a second wave of the virus.

The winter flu season features two types of influenza. Here's what you need to know about them and how they differ.

In today’s Health Alert, flu cases are on the rise, and Michigan is seeing very high flu activity, according to CDC data.

NEW YORK (Reuters) - The U.S. influenza rate is at or near its highest level in at least 15 years and is still on the rise, ...

So far this season, the CDC estimates there have been at least 24 million flu illnesses, 310,000 hospitalizations and 13,000 ...

The flu is spreading far and wide across the U.S. – and influenza A is largely to blame. Of all the flu tests reported to the Centers for Disease Control and Prevention since the start of flu season ...

H5N1 isn’t going away anytime soon and could become a pandemic. Here are some tips to help you understand your risk ...

In the relatively few U.S. cases of human bird flu so far recorded, symptoms have typically been mild -- congestion, pink eye ...