Flu visits reach highest levels since 2009 pandemic: 7 respiratory virus updates
Flu levels have surged to their highest levels since the peak of the 2009 swine flu pandemic, with influenza-related emergency department visits remaining very high across the U.S.
Flu levels have surged to their highest levels since the peak of the 2009 swine flu pandemic, with influenza-related emergency department visits remaining very high across the U.S.
