how long does hepatitis a vaccine last
A Stacy Wiegman, PharmD, Pharmacy, answered. You can expect the hepatitis A vaccine to provide protection against infection for at least 20 years. If you cannot remember when you were last vaccinated, your doctor can help determine if you are still protected. Stacy Wiegman, PharmD, Pharmacy, answered. You can expect the hepatitis A vaccine to provide protection against infection for at least 20 years. If you cannot remember when you were last vaccinated, your doctor can help determine if you are still protected.