Patient's question:
Born with vaccinations, now 12 years old, obtained a pack of informed consent forms for vaccines, no antibody test required, should I get vaccinated.Doctor's answer:
Hello. The validity period of the hepatitis B vaccine is generally about 20 years. If you frequently come into contact with hepatitis B patients, the validity period may be extended. To make an imperfect analogy, the antibodies produced by the vaccine are in a way substituting for us to engage in combat with the hepatitis B virus that we might normally encounter, and this process involves some consumption. Therefore, the antibodies gradually decrease after the initial vaccination as time goes by.First, you should have your child tested for the five hepatitis B items. If the antibodies are already negative, it is definitely necessary to get another vaccination, and you should follow the same 0, 1, 6 schedule to receive three shots. If the result is weakly positive, only one additional shot is needed. Since your child has already been vaccinated for 12 years, I don’t think the likelihood of a strong positive result is very high.