how long are hepatitis a vaccines good for
How long does hepatitis A vaccine protect you? Estimates for long-term protection for fully vaccinat-ed people (i.e., full two-dose series) suggest that pro-tection from hepatitis A virus infection could last for at least 25 years in adults and at least 14â20 years in children.ow long does hepatitis A vaccine protect you? Estimates for long-term protection for fully vaccinat-ed people (i.e., full two-dose series) suggest that pro-tection from hepatitis A virus infection could last for at least 25 years in adults and at least 14â20 years in children.