How long does a hepatitis A vaccine last? How long does hepatitis B vaccine last?

By Dr. Majid Alinia

05/07/2024

Hepatitis A vaccinations usually consist of a single initial injection and a second dose six to twelve months later. You should be protected for at least 25 years with two doses.
Vaccines protect against hepatitis B for at least 20 years and possibly for life. Those who have completed the three-dose vaccination series usually do not need booster shots.

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