Quote:
Originally Posted by PugMom
thank you for a very interesting thread. lots of info, with intelligent comments & Eagle's humor makes it all fall into place. question: do we need to have the shot each year? OBB states she did not need the booster in her experience. do they (Dr's) check titer levels?
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Still under study but initial evidence is at least two years. The GSK version so far appears to last a little longer.