US go-ahead for Glaxo flu vaccine
The US Food and Drug Administration has approved Fluarix Quadrivalent to immunise children aged three and older and adults against flu virus subtypes A and B contained in the vaccine.
It is the first intramuscular vaccine to protect against four influenza strains. Three-strain flu vaccines currently administered help protect against the two most common A virus strains and the B strain expected to be predominant in a given year, the company said.
Since 2000, however, two B virus strains have circulated to varying degrees each season, meaning patients infected with the B virus not contained in the vaccine were not immunised.