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Doctor insights on: How Long Do The Hepatitis A And B Vaccines Protect You

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How long do the hepatitis a and b vaccines protect you?

How long do the hepatitis a and b vaccines protect you?

Likely a lifetime: This question has many variables, but our clinical and scientific/experimental experience with these vaccines suggests that life-long immunity is likely. This is demonstrated by current recommendations of not needing booster doses, even when titers are zero in a person who has been fully vaccinated. These vaccines produce strong anamnestic responses in our bodies to confer longterm protection. ...Read more

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Dr. Jay Park
1,157 doctors shared insights

Hepatitis (Definition)

Hepatitis is an inflammatory condition of the liver. Almost all cases are caused by viruses--most commonly hepatitis A, hepatitis B, and hepatitis C--or by toxins such as alcohol. With hepatitis, the liver will swell and not work properly, failing to rid the ...Read more


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How long do hepatitis a and b vaccines protect you?

How long do hepatitis a and b vaccines protect you?

Varies: Immunization should normally protect you for life, but in some individuals, the immunity fades away, in this case a booster shot may be needed, others may never be protected even after multiple series of shots, specially for hepatitis b. ...Read more

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How long are hepatitis a & b vaccines good?

Hep a &b vaccines: Hepatitis b vaccine is good for at least 25 years as we know now if you had successful series of three vaccines and same will hold true for hep a vaccine series of two shots 6 months apart as we know now no boosters are being given or contemplated to these vaccines, but these vaccines are relatively new and how long immunity will last, will it be life long or not is not known at this time. ...Read more

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Will the hepatitis a vaccine protect someone from other forms of hepatitis?

Will the hepatitis a vaccine protect someone from other forms of hepatitis?

No: The hepatitis a vaccine is given as a series of 2 injections over 6 months. Once it is given, a lab test can be performed to establish if it was successful. Once the blood test shows the presence of hepatitis a antibody in your blood you are immune from contracting hepatitis a only. There is also a vaccine available for hepatitis b but there is no vaccine available for hepatitis c. ...Read more

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I had a hepatitis A vaccine six days ago and have been feeling nauseous since the day after the vaccine. Is this normal? How long should it last?

I had a hepatitis A vaccine six days ago and have been feeling nauseous since the day after the vaccine.  Is this normal?  How long should it last?

Should resolve: Side effects of the hepatitis A vaccine usually are mild. Soreness at the site of injection is common. Less commonly, recipients may complain of headache or fatigue, some nausea and abdominal discomfort. This should not last more than week. If it does, see your MD for assessment. Remember that hepatitis A vaccine is two shots, spaced 6 months apart. You may or may not have similar symptoms ...Read more

Dr. Brett Kalmowitz
644 doctors shared insights

Hepatitis A (Definition)

It is a viral infection of your liver usually food born that will resolve over time with ...Read more