This year's flu shot: 2009 (H1N1), A(H3N2) and B/Massachusetts

BETHESDA, Md., Oct. 10 (UPI) -- This year's flu vaccine will protect against three strains most likely to cause the flu, but some vaccines will have an additional strain, U.S. officials say.
Source: Health News - UPI.com - Category: Consumer Health News Source Type: news