If children are repeatedly vaccinated, they may have some reactions, such as impaired liver and kidney function or fever, cough and other symptoms, as follows: 1. If children are repeatedly vaccinated, very few of them may have impaired liver and kidney function; 2. If children are very sensitive, repeated vaccination may lead to fever and other reactions of vaccination, such as after measles vaccine or encephalitis vaccine, some children may For example, after receiving measles vaccine or encephalitis vaccine, some children may have fever and symptoms such as coughing and wanting to sleep all the time; vaccination can effectively prevent various infectious diseases in children, and measles vaccine can effectively prevent measles. However, repeated vaccinations for children may cause some side effects in children. Therefore, vaccination of children must be done carefully and in strict accordance with the vaccination schedule, so that vaccinations are not given by mistake, missed or repeated.