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

The U.S. winter virus season is in full force, and by one measure is the most intense in 15 years.

We fact-checked five recent statements ... Every year, scientists track the effectiveness of the annual flu vaccine. And every year, dozens of studies document the vaccine’s effectiveness ...

The information was not reported as it usually is by the CDC, in a weekly breakdown of flu activity called FluView, but was added to a section that focuses on respiratory illnesses in general. Trends ...

The fact that the CDC didn’t release its usual flu report on Friday should not be a cause for major alarm, experts said. And it’s not unprecedented for the FluView to be delayed. It was ...

H5N1 Bird Flu Spreads In US: Highly infectious H5N1 virus, also known as the bird flu virus has tightened its grip on the United States. For the first time, Highly Pathogenic Avian Influenza (HPAI ...

According to the CDC, Bird flu is a disease caused by avian influenza A viruses that usually spread between birds, not people. Most human cases of bird flu in the U.S. have been mild so far ...

According to the CDC, Bird flu is a disease caused by avian influenza A viruses that usually spread between birds, not people. Most human cases of bird flu in the U.S. have been mild so far ...