Recommendations for Influenza Vaccine Composition

Northern hemisphere: 2004-2005

It is recommended that vaccines to be used in the 2004-2005 northern hemisphere influenza season contain the following:

  • an A/New Caledonia/20/99(H1N1)-like virus
  • an A/Fujian/411/2002(H3N2)-like virusa
  • a B/Shanghai/361/2002-like virusb

a The currently used vaccine virus is A/Wyoming/3/2003. A /Kumamoto/102/2002 is also available as a vaccine virus.

b Candidate vaccine viruses include B/Shanghai/361/2002 and B/Jilin/20/2003 which is a B/Shanghai/361/2002-like virus.

For more detailed information please see:
Recommended composition of influenza virus vaccines for use in the 2004-2005 influenza season
Weekly Epidemiological Record, 27 February 2004