A 20-year-old male asked:
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how can a flu shot be effective if it bypasses your iga immune system? isn't contracting and fighting always better than introducing. never had a flu

1 doctor answer
Dr. John Gaffney
24 years experience Psychiatry
Bypass IgA?: The flu vaccine induces cellular production of IgA, IgG, & IgM. Moreover, increasing herd immunity through vaccines protects those who are unable to be vaccinated. You can check out this article from the academic journal, Immune for more info. Hope that helps! Vaccine. 2012 Aug 31;30(40):5893-900. doi: 10.1016/j.vaccine.2012.04.109. Epub 2012 Jul 24.
Answered on Jan 25, 2015

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