Cold and flu season is in full swing. As the months get colder and folks are indoors more often, these respiratory illnesses ...

For the first time since 1952, publication of the CDC's Morbidity and Mortality Weekly Report was halted. It returned on Feb.

The United States is seeing a second peak in flu cases this season. After doctor's office visits for flu dipped early this ...

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A new strain of H5N9 bird flu was detected at a commercial duck operation in California's Merced County. All the ducks were ...

A Kentucky child who was unvaccinated for influenza has died from the flu, the Kentucky Department for Public Health ...

Wisconsin is among 10 states to report human cases of the H5N1 virus so far, with more than half reported in California.

Dairy herds in Nevada have been infected by a version of the H5N1 bird flu not previously seen in cows, putting virologists ...

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

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

Of all the flu tests reported to the Centers for Disease Control and Prevention since the start of flu season last fall, about 97% have turned up positive for influenza A. Influenza A is further ...