More Americans may have had bird flu without suffering any symptoms, a new study finds. That could allow the virus to mutate ...

There are two broad types of influenza — flu A and flu B — and many strains within those, but the current spike in flu cases ...

The state of Michigan has confirmed the flu has killed two children making them the first pediatric flu deaths in the state ...

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

Partial CDC data suggest that influenza deaths may have already reached as high as 2% of deaths for the week ending on Feb. 1 ...

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

Liubomyr Vorona/iStock / Getty Images Plus According to the CDC, there are two other types of flu viruses: C and D. Influenza C typically only causes mild illness and is not thought to cause human ...

Influenza viruses cause tens of millions of illnesses and thousands of deaths in the United States each year. There are two players every flu season: influenza Type A and Type B. Influenza A tends ...

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.

During the COVID pandemic, RSV showed a slightly odd pattern: like flu, it basically disappeared in the 2020–2021 season, ...

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