Just how bad is this flu season? Experts weigh in
Two-thirds of confirmed cases in the U.S. have been caused by the dangerous H3N2 strain.
Two-thirds of confirmed cases in the U.S. have been caused by the dangerous H3N2 strain.
A severe strain of the virus is circulating, and it's not too late to get vaccinated.
Next season's flu shot includes last year's missing strain.