How Long Does a Hepatitis A Vaccine Last?


Quick Answer

The hepatitis A vaccine is effective for at least 25 years in adults and at least 14 to 20 years in children, the Centers for Disease Control and Prevention advises. Two doses of the vaccine are needed for lasting protection and should be given at least six months apart.

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Full Answer

The CDC recommends that all children be vaccinated against hepatitis A between their first and second birthdays. People traveling to countries with a high incidence of hepatitis A should be vaccinated, as should persons planning to adopt children from countries where hepatitis A is common. Other people at increased risk for hepatitis A infection include men who have sex with men, people who receive clotting factor concentrates or have chronic liver disease, and illegal drug users.

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