Recommended composition of influenza virus vaccines for use in the 2013 southern hemisphere influenza season

Overview

20 September 2012

It is recommended that trivalent vaccines for use in the 2013 influenza season (southern hemisphere winter) contain the following:

• an A/California/7/2009 (H1N1)pdm09-like virus *;
• an A/Victoria/361/2011 (H3N2)-like virus **;
• a B/Wisconsin/1/2010-like virus ***;

It is recommended that quadrivalent vaccines containing two influenza B viruses contain the above three viruses and a B/Brisbane/60/2008-like virus ****.

* A/Christchurch/16/2010 is an A/California/7/2009-like virus;
** A/Ohio/2/2012, A/Maryland/2/2012, A/South Australia/30/2012, A/Brisbane/1/2012 and A/Brisbane/6/2012 are A/Victoria/361/2011-like viruses;
*** B/Hubei-Wujiagang/158/2009 and B/Texas/6/2011 are B/Wisconsin/1/2010-like viruses;
**** B/Brisbane/33/2008 is a B/Brisbane/60/2008-like virus.