Influenza levels in the US are the highest they've been in 15 years amid winter weather and a second wave of the virus.
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 15 years.
Outpatient health care visits for flu-like illnesses are at their highest levels in 15 years, according to data updated ...
A San Francisco resident is the second child in the United States to contract the viral bird flu, the U.S. Centers for Disease Control and Prevention confirmed to SFGATE. A CDC spokesperson said ...