Which vaccines should be immunized after elementary school depends on the specific situation of the individual. Generally in our country within 6 years of age, the planned immunization have been completed, but some of the planned immunization vaccine, with the time to appear antibody titer gradually decline, has exceeded the vaccine’s immunity period, and some antibodies even disappeared, so you can strengthen the injection of a time, for example, chickenpox vaccine, MMR vaccine, which can effectively prevent the onset of chickenpox, measles or mumps. Hepatitis B vaccine, for example, also requires a booster shot if the antibody disappears, which can prevent hepatitis B virus infection. Hepatitis B vaccines have a maximum immunization period of 12 years, but shorter ones usually may have lost antibodies in early childhood, so regular monitoring is needed. Some vaccines are unplanned vaccinations, such as hepatitis A vaccine and influenza vaccine, which can be self-selected and are mostly used for susceptible people. There are emergency vaccinations, such as rabies vaccine, which is used after an animal bite, and tetanus vaccine, which is used to prevent tetanus infection after various traumas.