tetano
Editor, Senior Moderator
ATLANTA -- Two of the three strains covered by the seasonal influenza vaccine are changing for the upcoming season, and with that change comes a new dosing algorithm for children.
The trivalent inactivated vaccine will still contain the 2009 pandemic H1N1 strain, but the H3N2 and B strains will be replaced. The H3N2 component is changing from A/Perth/16/2009 to A/Victoria/361/2011, and the B component is changing from the Victoria-lineage B/Brisbane/60/2008 to the Yamagata-lineage B/Wisconsin/1/2010.
In part because of those changes, the dosing algorithm for children ages 6 months through 8 years has been modified at a regular meeting of the Advisory Committee on Immunization Practices (ACIP) at CDC headquarters here.
For the 2011-2012 season, two doses of the seasonal vaccine separated by at least 4 weeks were recommended for children who did not receive at least one dose of the 2010-2011 seasonal vaccine or who had unknown vaccination status. Children who did receive at least one dose of the 2010-2011 vaccine required only one dose of the 2011-2012 vaccine.
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http://www.medpagetoday.com/MeetingCoverage/ACIP/33385
The trivalent inactivated vaccine will still contain the 2009 pandemic H1N1 strain, but the H3N2 and B strains will be replaced. The H3N2 component is changing from A/Perth/16/2009 to A/Victoria/361/2011, and the B component is changing from the Victoria-lineage B/Brisbane/60/2008 to the Yamagata-lineage B/Wisconsin/1/2010.
In part because of those changes, the dosing algorithm for children ages 6 months through 8 years has been modified at a regular meeting of the Advisory Committee on Immunization Practices (ACIP) at CDC headquarters here.
For the 2011-2012 season, two doses of the seasonal vaccine separated by at least 4 weeks were recommended for children who did not receive at least one dose of the 2010-2011 seasonal vaccine or who had unknown vaccination status. Children who did receive at least one dose of the 2010-2011 vaccine required only one dose of the 2011-2012 vaccine.
...
http://www.medpagetoday.com/MeetingCoverage/ACIP/33385