General vaccination should be carried out in a good state of health, when you are sick, you can not take vaccination, based on the following reasons: 1, the purpose of vaccination is to produce an immune response to achieve the effect of preventing disease, the sick state of the body may not be able to produce enough immune effect, resulting in poor results of vaccination or even lead to the failure of the vaccination. 2, after the vaccination body To produce a short-term immune response, the child’s resistance may be temporarily reduced, easy to secondary various diseases, especially the possibility of secondary viral or bacterial infection. When you are sick, the possibility of being infected by this kind of inoculation is greatly increased, and it is not recommended.3, the body produces an immune response after vaccination, it may also affect the child’s digestive system, causing the child’s appetite to reduce, nausea, and other symptoms, and when you are sick, most of the cases may have a certain degree of impact on the digestive system, and at this time, vaccination will make the child’s digestive system symptoms greatly increase, and may cause the child to be more prone to allergic diseases.