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What if we violate the minimum 6 month interval between Hepatitis A doses by more than four days?

April 26, 2017days doses hepatitis interval minimum month violate

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What if we violate the minimum 6 month interval between Hepatitis A doses by more than four days?

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The second dose would be invalid, and should be repeated after an interval of at least 6 months. A single dose of Hepatitis A vaccine is 95-97 percent immunogenic, so it is protective in the short term. The second dose is important to provide long-term immunity.