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That is for 2011. The effectiveness of the vaccine is different every year. Some years it gets close to 80% (from memory and probably wrong), some years it is only 10%. The average across all years tends to be 40%.


Do you have references to numbers your are quoting? I searched for 60-80% number quoted by GP but found nothing even close.


https://www.cdc.gov/flu/professionals/vaccination/effectiven...

Where my numbers disagree with the above (nearly all!) I stand corrected.




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