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

Last year there were 207 pediatric deaths attributed to the flu, NBC News reported. The CDC said the number of cases is ...

Data on flu test positivity and Tamiflu prescription fills show that influenza activity has already surpassed the past 7 ...

Flu infections are at or near their highest levels in at least 15 years and are still rising, the Centers for Disease Control and Prevention says.

Of the 50 states, 40 are reporting high or very high levels of flu activity. Nearly released data shows the current U.S. flu ...

Flu cases are surging across the country – more than half of states are now at "very high" levels, the most severe ...

A Nevada dairy worker has tested positive for a newly identified strain of bird flu, sparking concerns about potential cow-to ...

Are people at risk for bird flu? How can I protect myself? Bird flu’s risk for the general public is still low, with no signs ...

Winter flu season in the US is at its most severe in 15 years, with over 24 million cases and 13,000 deaths, including 57 ...

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