|Officials approve first 4-in-1 flu vaccine |
|Posted: Thursday, March 1, 2012 9:05 pm |
|WASHINGTON (AP) — Federal health officials have approved the first vaccine that protects against four strains of the common flu, offering one additional layer of protection against the influenza virus. |
The Flumist Quadrivalent vaccine from MedImmune protects against two strains of influenza A and two strains of influenza B.
Previously all vaccines contained two strains of influenza A and one strain of influenza B, chosen annually by medical experts based on their potential to spread through the population. Having an extra strain of influenza B increases the likelihood that the vaccine will protect against illness, the FDA said in a statement.
Similar to the previously approved Flumist, the new vaccine is a nasal spray that delivers weakened strains of the virus. Published in The Messenger 3.1.12