What it is
Hepatitis means inflammation of the liver. Hepatitis A and hepatitis B are caused by two different viruses, and they behave differently in the body. Hepatitis A is spread mostly through contaminated food, water, or close contact, and it is generally an acute illness that the body clears on its own. Hepatitis B is spread through blood and certain body fluids, and it can sometimes become a long-term (chronic) infection.
Vaccines for hepatitis A and hepatitis B are FDA-regulated products that help the immune system recognize these viruses before a person is exposed. They are available as separate vaccines for each virus, and a combined hepatitis A and B vaccine is also available in the United States. Which option is appropriate is a decision for a licensed clinician.
Neither vaccine treats an existing infection. They are about prevention. If someone already has hepatitis B or hepatitis C, modern antiviral care is a separate conversation: hepatitis B is effectively managed with antiviral therapy and monitoring, and hepatitis C can often be treated and cleared with antiviral medication. A clinician can explain what applies to each person.
How it’s traditionally been approached
Public health programs have long recommended hepatitis B vaccination for infants and children, and hepatitis A vaccination has been part of routine childhood care in many places. Adults who were not vaccinated earlier may also be offered these vaccines depending on their circumstances.
Clinicians have often discussed vaccination with people who travel to regions where hepatitis A or B is more common, people with chronic liver disease, people who have injected drugs, people with certain occupational exposures, and others at higher risk. These conversations are meant to be factual and free of judgment, since anyone can be exposed.
Vaccination is often paired with screening, which means blood tests that can show whether someone has been infected or is already protected. Whether screening, vaccination, or both make sense is something a licensed clinician decides after talking with you about your history.
How the right doctor may help
A doctor who focuses on prevention may help by reviewing your vaccination records, health history, travel plans, work, and any risk factors. They may explain whether blood tests could show if you already have immunity or past exposure, and whether a hepatitis A and B vaccine may be a good fit for you.
A visit is generally a conversation first. You might be asked about past vaccines, allergies, pregnancy, current health conditions, and medications. If you are unsure of your records, a provider may help you find them or talk through options. Any decision about vaccination is made by you together with the clinician.
Helpful questions to bring: Am I already protected against hepatitis A or B? Would a combined vaccine or separate vaccines be appropriate for me? Are there reasons I should be screened? What side effects should I know about? What should I do if I think I was exposed? You can also ask whether the vaccine is FDA-approved for your age and situation.
The whole-person view
Body, mind, and stress affect each other. Worry about infection, health costs, or past medical experiences can make it harder to ask questions or keep up with preventive care, while good sleep, nourishing food, and steady support can help people feel more able to take care of their health.
If stress or anxiety around medical care is weighing on you, body-based support such as Somatic Experiences may help some people feel more settled, and talk therapy through Therapists.plus may help others work through health-related worry. These approaches complement, rather than replace, care from a licensed clinician.
Keep in mind
- This page is educational only and is not medical advice; a licensed clinician should guide decisions about vaccination, screening, and any hepatitis treatment.
- Vaccines are FDA-regulated, and only a licensed provider can decide what is appropriate for you after an evaluation.
- Seek emergency care by calling 911 for severe symptoms such as confusion, severe abdominal pain, vomiting blood, or significant yellowing of the skin or eyes with fever. This site is not for emergencies.
- If you are in emotional crisis, call or text 988. You can also find licensed providers through Providers.plus.
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Frequently asked questions
What is the hepatitis A and B vaccine?
The hepatitis A and B vaccine is a preventive vaccine that helps the immune system protect against two different liver viruses. A combined version exists, and separate vaccines for each virus are also available. A licensed clinician can explain which option may suit you.
Does the hepatitis A and B vaccine treat hepatitis?
No, the vaccine is designed for prevention, not for treating an existing infection. People who already have hepatitis B or C can talk with a clinician about antiviral care, which is a separate conversation. Hepatitis B is effectively managed with antiviral therapy and monitoring, and hepatitis C can often be treated and cleared.
Who might talk with a doctor about the hepatitis A and B vaccine?
Many people may benefit from the conversation, including those who travel to higher-prevalence regions, have chronic liver disease, have injected drugs, or have certain jobs or exposures. Adults who were never vaccinated or are unsure of their records may also ask. A clinician can look at your individual situation without judgment.
Is hepatitis A the same as hepatitis B?
No, they are caused by different viruses and are spread differently. Hepatitis A is generally acute and self-limited, while hepatitis B can sometimes become a chronic infection. Both affect the liver, which is why prevention is often discussed together.
Should I get screened before getting a hepatitis vaccine?
Sometimes, but that is a decision for a licensed clinician. Blood tests can show whether you are already immune or have been exposed in the past. Ask your provider whether screening makes sense for you.
Is the hepatitis A and B vaccine FDA-approved?
Yes, hepatitis A and hepatitis B vaccines, including a combined product, are FDA-licensed in the United States for specific uses and age groups. Whether a given vaccine is appropriate for you is for a licensed clinician to decide after an evaluation. It is reasonable to ask a provider about approved uses and possible side effects.
Educational resource. Hep Programs shares general information and connects people with independent doctors. It is not medical advice, diagnosis or treatment. Talk with a licensed professional about your health.