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Is it necessary for adults to receive the hepatitis A vaccine?

Apr 10, 2022 Source: Cainiu Health
Dr. Huang Wenxiang
Introduction
Is the hepatitis A vaccine necessary for adults? Yes, the hepatitis A vaccine is recommended for adults. Vaccination effectively prevents hepatitis A infection. It is generally recommended for children aged one year and older, as well as adults—particularly healthcare workers, individuals with potential exposure to the hepatitis A virus, and personnel involved in food safety.

After receiving the hepatitis A vaccine, the body produces hepatitis A antibodies. These antibodies neutralize the hepatitis A virus, thereby preventing disease onset and conferring long-lasting immunity. So, is hepatitis A vaccination necessary for adults? Let’s explore this further.

Is Hepatitis A Vaccination Necessary for Adults?

Yes, hepatitis A vaccination is recommended for adults. Vaccination effectively prevents hepatitis A infection. It is generally recommended for children aged one year and older, as well as adults—particularly healthcare workers, individuals with potential exposure to the hepatitis A virus, and personnel involved in food safety.

There are two types of hepatitis A vaccines: live attenuated hepatitis A vaccine and inactivated hepatitis A vaccine. The domestically produced live attenuated vaccine is provided free of charge and requires only a single dose. In contrast, the inactivated vaccine requires two doses administered six months apart and is self-funded. Vaccination induces protective hepatitis A antibodies, conferring lifelong immunity and significantly reducing the risk of hepatitis A infection. Additionally, if hepatitis A does occur, timely treatment is essential. Hepatitis A typically presents as acute viral hepatitis, and with appropriate management, the vast majority of patients achieve full recovery.

Precautions Before Hepatitis A Vaccination

The domestically produced hepatitis A vaccine is a live attenuated vaccine administered via subcutaneous injection at a dose of 1 mL. Vaccination is contraindicated in individuals with: fever exceeding 37.5°C; acute infectious diseases or other severe illnesses; immunodeficiency or those receiving immunosuppressive therapy; pregnancy; or known hypersensitivity (allergy). The imported hepatitis A vaccine is an inactivated vaccine administered intramuscularly. For children and adolescents aged 1–18 years, the recommended dose is 0.5 mL per injection; for individuals aged 19 years and older, the dose is 1.0 mL per injection. A second dose should be administered 6–12 months after the first.

We hope the above information is helpful to you.

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