Aa
Hepatitis A vaccine
Hi I had hep a vaccine in 2006 and then booster in 2009. Am I still covered?
Questionable. The two vaccinations for Hep A are supposed to be given within 6-12 months of each other for the highest efficacy. A single vaccination covers 10 years, while having both provides immunity for at least 20 years. Given the multi-year spacing between vaccines, I'm not sure which category you fall into. If you are at risk for Hep A, you can always get the two-dose series again - it won't hurt anything.
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