Precautions for Hepatitis A Vaccination

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, what precautions should be taken before receiving the hepatitis A vaccine? Below is a detailed explanation.

Precautions for Hepatitis A Vaccination

Domestically produced hepatitis A vaccines are live attenuated vaccines administered via subcutaneous injection at a dose of 1 mL. Vaccination is contraindicated in individuals with a body temperature exceeding 37.5°C; those suffering from acute infectious diseases or other severe illnesses; those with immunodeficiency or undergoing immunosuppressive therapy; pregnant women; and individuals with known allergies or hypersensitivity.

Imported hepatitis A vaccines are inactivated vaccines administered via intramuscular injection. For children and adolescents aged 1–18 years, the recommended dose per injection is 0.5 mL; for individuals aged 19 years and older, the dose is 1.0 mL. A second dose is required 6–12 months after the first.

Additional Information: Modes of Hepatitis A Transmission

1. Contact Transmission

Hepatitis A can spread through everyday objects contaminated with the hepatitis A virus—such as utensils (e.g., bowls, chopsticks, cups), towels, bath towels, washbasins, bedding, or clothing—making this one of the primary transmission routes.

2. Bloodborne Transmission

Transmission may occur via blood transfusion or intravenous infusion, typically in poorly regulated private clinics or small hospitals with substandard hygiene practices. In contrast, reputable hospitals maintain strict sterilization protocols and rigorous standards for infusion and transfusion equipment, making hepatitis A transmission extremely unlikely.

3. Sexual Transmission

Sexual contact is another significant route of hepatitis A transmission. The virus may be present in human bodily fluids—including saliva, semen, and vaginal secretions—so unprotected sexual contact with an infected individual carries a high risk of transmission.

The above outlines key precautions to observe before receiving the hepatitis A vaccine. We hope this information is helpful to you.