Officials say this particular strain of the flu is both contagious and strong.
Influenza levels in the US are the highest they've been in 15 years amid winter weather and a second wave of the virus.
United States, with 43 states reporting high or very high outpatient respiratory illness activity, according to FluView, a ...
Levels of influenza nationwide are now at the highest they have been since the peak of the 2009 swine flu pandemic, according ...
A new strain of bird flu has infected a dairy worker in Nevada, marking the first cow-spread case, the CDC has reported.
Flu cases are surging across the nation, closing nearly a dozen schools and swamping hospitals in some states. At least 24 ...