A new flu vaccine is now on the market.
The Food and Drug Administration has approved the first four-strain influenza vaccine. Adults and children 6 months and older can get it. Older vaccines only provide protection against three flu viruses.
"This is going to be a transitional year," said Christine Finley, the immunization program director at the Vermont Department of Health. "There will still be vaccines, probably a majority of the vaccine out there will protect against the three viruses. And then the nasal spray and the two of the others are going to protect against the four."
Fluzone Quadrivalent is now available in the form of a nasal spray. Other manufacturers will offer the vaccine later this year in a shot.