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A member asked:
What is different about the flu vaccine from one year to the next?
7 doctors weighed in across 2 answers
Depends: Each year the mixture of the flu strains used for the vaccine is different so you have to be vaccinated each year. This is more information from the cdc. http://www.cdc.gov/flu/protect/vaccine/qa_intradermal-vaccine.htm.
Answered 10/23/2017
5.9k views
Time sensitive: The flu mutates/changes often and international travel brings a constantly changing pattern of different strains. To create a fall flu vaccine the manufactures must choose the strains causing the most flu, rush a vaccine into production, test and retest it and distribute it to the public. New strains make last years vaccine less effective, next year new strains make this years vaccine less effecti
Answered 12/16/2017
450 views
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