Hepatitis B vaccine every few years.

Adults should receive hepatitis B vaccine at intervals of 5 years, depending on antibody test results. Hepatitis B vaccine is a vaccine against hepatitis B virus infection. After vaccination, adults develop antibodies to hepatitis B and are immune to the virus. However, antibody levels decrease over time, so regular antibody testing is needed to determine whether revaccination is needed. Antibody testing methods include quantitative hepatitis B surface antibody testing and qualitative hepatitis B five tests. If the antibody test results are weakly positive or negative, you need to be vaccinated again. Generally speaking, the interval between vaccinations for hepatitis B is about 5 years, but for high-risk groups Hepatitis B vaccination is not suitable for all people. Special attention should be paid to the following groups when receiving hepatitis B vaccine: those who are allergic to the components of hepatitis B vaccine; Patients with acute disease, severe chronic disease, acute attack of chronic disease; fever; pregnant women. In addition, after vaccination, there may be adverse reactions such as redness, pain, fever, etc. at the inoculation site, which generally do not require special treatment and can be relieved by themselves. If the symptoms persist or serious discomfort occurs, seek medical attention promptly. In short, the interval between adults and hepatitis B vaccine needs to be determined according to the antibody test results. It is recommended to regularly carry out antibody testing to ensure the level of hepatitis B antibody in the body. At the same time, it is necessary to pay attention to contraindications and adverse reactions when vaccinating hepatitis B vaccine. If there is discomfort, seek medical advice in time.