Levels of influenza nationwide are now at the highest they have been since the peak of the 2009 swine flu pandemic, according to figures published Friday by the Centers for Disease Control and ...

Flu infections have reached the highest level since the winter of 2010 and 2011 when the swine flu swept across the nation, data from the Centers for Disease Control and Prevention shows.

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

Last week, that number was clearly higher than the peak of any winter flu season since 2009-2010, when a swine flu pandemic hit the nation, according to data posted Friday morning by the Centers for ...

This flu season has reached unprecedented intensity, according to data from the Centers for Disease Control and Prevention.