The U.S. winter virus season is in full force and driving more doctor's office visits than any in the past decade.

One indicator of flu activity is the percentage of doctor’s office visits driven by flu-like symptoms. Last week, that number ...

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

People have been urged to look out for some of the telltale signs of a nasty winter bug currently spreading “like wildfire” ...

Norovirus - dubbed the 'winter vomiting bug' - causes a host of unpleasant symptoms, including vomiting and diarrhoea as well ...

Three wards have been closed at one London hospital due to an outbreak of the highly contagious virus, which causes vomiting ...

It's an unusual winter for respiratory illnesses. The flu is peaking twice: once in early January and again in February.

Despite the severity of this flu season, vaccination rates have remained consistent with previous years, according to the CDC ...