Hepatitis B booster shots need to be given at the local community or CDC. For normal people, hepatitis B vaccine requires three shots, i.e., one shot at the beginning, one shot after one month, and one shot after six months, and the hepatitis B penta-indicator needs to be checked after the three shots. If Hepatitis B V indicator shows that surface antibody is positive, there is protective antibody and no need to take booster shots. If it is negative, you need to continue to take Hepatitis B vaccine, or three shots. If the hepatitis B surface antibody is weakly positive, you need to take booster shots. After taking booster shots, it is usually recommended to re-check the hepatitis B penta-indicator in 1-3 months to see what the titer of the hepatitis B surface antibody is.