Mismatch in this season's flu shot is bad news for children

This year's flu vaccine is "not a very good match" for a common strain of the flu that's especially tough on children, according to the nation's top infectious disease doctor.

Mismatch in this season's flu shot is bad news for children
This year's flu vaccine is "not a very good match" for a common strain of the flu that's especially tough on children, according to the nation's top infectious disease doctor.