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

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

The worst flu season in years is swamping California, prompting a renewed surge in hospitalizations as officials warn the ...

"Society as a whole is less immune, we have slightly lower vaccination rates, and so our defenses are slightly down." Is it too late to get a flu shot? It's not too late to get a flu shot — in ...

Outbreaks and high levels of illnesses (like the flu) have become more common as vaccination rates have fallen, especially ...

It’s not unusual historically to see high numbers of respiratory viruses floating around during this time frame,” a UNC ...

Is it common for the flu to zap us twice in the winter months? Massachusetts, and the U.S. for that matter, had a surge in ...

The flu is walloping every corner of Massachusetts in an unusual second surge of the season, with people reporting flu-like ...

Here's what parents need to know about the influenza vaccine for babies and children, plus why it's so important.

"Getting the flu vaccine may not prevent you from catching the flu," Dr. Juan Dumois said. "But you're less likely to end up ...

Flu is surging in Massachusetts. State numbers show more cases than in at least five years. Some doctors say it's more severe ...

Flu cases are rising in Vermont, and local pharmacists say they are seeing more people coming in with symptoms.