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

Influenza A — a nasty flu strain that fueled the 2009 flu epidemic — has been landing Ohioans in the hospital since the ...

Levels of influenza nationwide are now at the highest they have been since the peak of the 2009 swine flu pandemic, according ...

Outpatient health care visits for flu-like illnesses are at their highest levels in 15 years, according to data updated ...

U.S. medical services providers are seeing the greatest numbers of flu cases since the 2009-2010 flu season, the Centers for ...

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

Most of Trump’s health picks are uninterested in using most of the tools that can limit the spread of infectious disease.

Eleven states are experiencing very high levels of flu and some schools have been closed by the burden on students and staff.

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

Low vaccination rates may be contributing to the spread of flu, but data suggests the number of cases so far this season is ...

When H5N1 first came to the attention of infectious disease professionals 20 years ago, there was concern it could mutate and ...