According to the National Immunization Program vaccine schedule, the vaccines for children at the age of 6 years include mandatory vaccines and voluntary vaccines. The mandatory vaccines include the first dose of DPT, the fourth dose of group A influenza vaccine, the third dose of live attenuated encephalitis B vaccine or the fourth dose of inactivated encephalitis B vaccine, which are free of charge by the State. In addition, at the age of 6, you can voluntarily choose to receive the following vaccines at your own expense: Group A+C Influenza Vaccine, Acellular DPT Vaccine, MMR Booster Vaccine, Hepatitis A Inactivated Vaccine or Hepatitis A Attenuated Vaccine, and Influenza Vaccine. If you have never received chickenpox vaccine, you can also receive chickenpox vaccine at the age of 6 years.