A 40-year-old member asked:
if i got one hepatitis a vaccination 3 years ago, what is my current level of immunity?
2 doctor answers
Dr. Lonna Larsh answered
29 years experience Family Medicine
Incomplete: To get lifelong immunity from vaccination, you are supposed to have a second vaccine within 6 - 12 months from the first. There is research to support that if you get your 2nd dose within 5 1/2 years (and maybe longer) you should not need any further vaccines however. See http://www.Nlm.Nih.Gov/medlineplus/ency/article/003684.Htm.
Answered on Dec 17, 2013
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