The main vaccines that babies need are hepatitis B vaccine, BCG vaccine, polio vaccine, diphtheria vaccine, influenza vaccine, measles vaccine, cerebral B vaccine, hepatitis A vaccine, mumps vaccine, diphtheria booster vaccine, etc. All these vaccines belong to the first class of vaccines and are mandatory. These vaccines are provided free of charge by the state, and each vaccine is shown in the vaccination booklet. Each vaccine has a time and number of vaccinations, and parents can give their babies vaccinations according to the time in the booklet. There are many vaccines that babies need after birth. In addition to these mandatory vaccines, there are also many preventive vaccines. Babies have vaccines that need to be given at each age, and parents can choose according to their baby’s needs. Babies should not take a bath after vaccination to avoid infection, drink more water, and do not exercise vigorously, which can cause some adverse reactions. After vaccination, parents should carefully observe the changes of their babies.