This week CDC announced, “who had won the beauty contest” for this coming seasons flu shot.
This week CDC announced, “who had won the beauty contest” for this coming seasons flu shot.

But first let’s go back and revisit last years 2012–13 influenza season.  In the United States, influenza activity increased through November and December before peaking in late December. Influenza A (H3N2) viruses predominated overall, but influenza B viruses and, to a lesser extent, influenza A H1N1 (2009 pandemic virus) viruses also were reported in the United States. This influenza season was moderately severe, with a higher percentage of outpatient visits for influenza-like illness (ILI), higher rates of hospitalization, and more reported deaths attributed to pneumonia and influenza compared with recent years.

And the winner is…(drum roll please)…

Trivalent Vaccine

  • A/California/7/2009(H1N1),
  • A(H3N2) virus antigenically like the cell-propagated A/Victoria/361/2011 virus (A/Texas/50/2012)
  • B/Massachusetts/2/2012-like (B/Yamagata lineage) virus. A/Texas/50/2012 is an egg-propagated A(H3N2) virus

Quadrivalent Vaccine

  • All of the above plus
  • B/Brisbane/60/2008-like (B/Victoria lineage) virus (1).

And now you know!

http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6223a5.htm?s_cid=mm6223a5_e