Recommendations for Influenza Vaccine Composition

Southern hemisphere: 2009

It is recommended that vaccines for use in the 2009 influenza season (southern hemisphere winter) contain the following:

— an A/Brisbane/59/2007 (H1N1)-like virus;*
— A/Brisbane/10/2007 (H3N2)-like virus;**
— a B/Florida/4/2006-like virus#.

* A/South Dakota/6/2007 (an A/Brisbane/59/2007-like virus) is a current vaccine virus used in live attenuated vaccines.
** A/Brisbane/10/2007 and A/Uruguay/716/2007 (an A/Brisbane/10/2007-like virus) are current vaccine viruses.
# B/Florida/4/2006 and B/Brisbane/3/2007 (a B/Florida/4/2006-like virus) are current vaccine viruses.