It is recommended that vaccines for use in the 2009-2010 influenza season (northern hemisphere winter) contain the following:

— an A/Brisbane/59/2007 (H1N1)-like virus;^*
— an A/Brisbane/10/2007 (H3N2)-like virus;^**
— a B/Brisbane/60/2008-like virus.^#

^* A/Brisbane/59/2007 is a current vaccine 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/Brisbane/33/2008 is a B/Brisbane/60/2008-like virus.

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