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Flu Season Continues

by Sue Hubbard, M.D.

Another Monday in the office and Influenza B is here in full force. Seeing all of the kids (and many of their parents) who have succumbed to flu B this season reminded me that the FDA has already recommended that the flu vaccine for next year contain a different B virus strain than this year’s vaccine. The Influenza B virus that is circulating in our area right now is not a good match for this year’s vaccine. Fortunately, Influenza B is typically not as serious and as lengthy as Influenza A. It seems that the flu vaccine this year was right on the mark for the Influenza A viruses that we have been seeing and provides good protection against flu A.

The flu vaccine that will be made over the next months for distribution next fall will only vary slightly from this year’s vaccine. The two Influenza A strains in this year’s vaccine will remain the same while the B component will change from type B/Florida to type B/Brisbane, which is the strain that we have been seeing this winter.

Determining the viruses to target in flu vaccine is always based on the epidemiology of flu strains that are circulating throughout the world. The strains must be chosen early in the year in order that manufacturers have a long enough time to ensure that vaccine will be available in the six to seven months ahead. Funny to already be discussing flu for 2009 – 2010 when we are still in the thick of the season for the current flu strain. Hopefully the season will soon be winding down.

That’s your daily dose, we’ll chat again tomorrow.

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