CDC data show flu hospitalizations at their highest level for this point in the season since 2010-11.

A G155E-mutated H1N1 strain is driving an early U.S. flu surge. Early data suggest the updated vaccine still offers ...

Don’t count on last year’s shot to be effective against this year’s strains. We asked a pharmacist to explain why.

Flu season is picking up months ahead of schedule with a mutated virus spreading in some parts of the United States.