The compostion of the 2013 – 2014 trivalent and quadrivalent flu vaccine for the Northern Hemisphere:
The World Health Organization has met in Geneva Switzerland in February 2013 to decide upon the composition of the Influenza or flu vaccine composition of the upcoming 2013-2014 flu season. A quote from their decision is below:
Recommended composition of influenza virus vaccines for use in the 2013-14 northern hemisphere influenza season
21 February 2013
It is recommended that trivalent vaccines contain the following:
an A/California/7/2009 (H1N1)pdm09-like virusa;
an A(H3N2) virus antigenically like the cell-propagated prototype virus A/Victoria/361/2011b*;
a B/Massachusetts/2/2012-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 virusc.
a A/Christchurch/16/2010 is an A/California/7/2009-like virus;
b A/Texas/50/2012 is an A(H3N2) virus antigenically like the cell-propagated prototype virus A/Victoria/361/2011;
c B/Brisbane/33/2008 is a B/Brisbane/60/2008-like virus.
* It is recommended that A/Texas/50/2012 is used as the A(H3N2) vaccine component because of antigenic changes in earlier A/Victoria/361/2011-like vaccine viruses (such as IVR-165) resulting from adaptation to propagation in eggs.
For more information
You may also want to read our follow up article, “Now is the time for your 2013 – 2014 flu vaccine“.
The 2013-2014 flu vaccine composition differs from the 2012-2013 and from the 2011-2012 flu vaccine composition. See below.
The Northern Hemisphere’s 2012-2013 seasonal influenza vaccine be made from the following three vaccine viruses:
- an A/California/7/2009 (H1N1)pdm09-like virus;
- an A/Victoria/361/2011 (H3N2)-like virus;
- a B/Wisconsin/1/2010-like virus (from the B/Yamagata lineage of viruses).
While the H1N1 virus used to make the 2012-2013 flu vaccine is the same virus that was included in the 2011-2012 vaccine, the recommended influenza H3N2 and B vaccine viruses are different from those in the 2011-2012 influenza vaccine for the Northern Hemisphere.
The Northern Hemisphere’s 2011-2012 seasonal influenza vaccine contain the following three flu viruses:
- an A/California/7/2009 (H1N1)-like virus;
- an A/Perth/16/2009 (H3N2)-like virus;
- a B/Brisbane/60/2008-like virus.
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