Vaccination is the most economical, effective and convenient means to prevent infectious diseases and is an important measure to protect children’s health and enhance their immunity, so every child should be vaccinated according to the national immunization plan with the assistance of parents. The first dose of hepatitis B vaccine and BCG vaccine is given after the birth of the child, which is given at the obstetrics department during delivery. The second dose of hepatitis B vaccine is given at one month, and the polio pill is given at two months. At three months, the first dose of Hepatitis B vaccine and the second dose of polio sugar pills were administered, and at four months, the second dose of Hepatitis B vaccine and the third dose of polio sugar pills were administered. At the age of 6 months, the third dose of diphtheria vaccine, the third dose of hepatitis B vaccine, and the first dose of group A influenza vaccine were given at the age of 8 months, the first dose of measles vaccine at the age of 8 months, and the second dose of group A influenza vaccine at the age of 9 months. The first dose of encephalitis B vaccine at one year of age. At one and a half to two years of age, they will receive a booster dose of diphtheria vaccine, a partial booster dose of polio pills, a booster dose of encephalitis B vaccine, and a vaccination against hepatitis A. At age 3, the third dose of group A flu vaccine can be replaced by group A plus C flu vaccine, and at age 4, the polio vaccine booster, measles vaccine booster, diphtheria vaccine booster, encephalitis B vaccine booster, and group A flu vaccine booster are given at age 6. BCG booster at age 12. The above is the schedule of the national class I vaccination. In addition to the free Class I vaccines, there is now a portion of Class II vaccines. It includes varicella vaccine for one year old and above, inactivated hepatitis A vaccine for about one year old, influenza vaccine for the annual influenza epidemic season, and oral rotavirus vaccine for infants and children from two months to three years old, 23-valent pneumococcal polysaccharide vaccine for high-risk groups from two years old and above, and Haemophilus influenzae type b conjugate vaccine for infants and children from 2 to 17 months old, etc. Class II vaccines are not forced by operational staff and are chosen voluntarily by parents.