Vaccines protect children from germs, but not all babies are suitable for vaccination, and not all babies can be vaccinated at any time. The following 10 types of conditions should never be vaccinated: 1. Allergies For example, if a baby is allergic to eggs or has a rash, it is best not to vaccinate such babies. 2.Diseases Babies with heart, liver, kidney diseases and tuberculosis are not suitable for vaccination. 3.Immunodeficiency Babies with congenital immunodeficiency and low immune function should not be vaccinated, especially live vaccines. 4. Babies with central nervous system diseases such as: underdeveloped brain function, epilepsy, high fever convulsions, history of convulsions, sequelae of encephalitis, etc. are not suitable for vaccination. Especially, the vaccines are mixed vaccine, B-brain and rheumatoid. If the baby is in the acute stage of disease or suffering from acute infectious disease, vaccination should be suspended to avoid aggravating the disease. It is recommended that vaccination be carried out one week after complete recovery. 6, cold and fever is not easy to inoculate If the baby has a fever and a body temperature of more than 37.5 ℃, inoculation should also be suspended. 7, skin disease is not easy to vaccinate If the baby has serious dermatitis, psoriasis, eczema, rash and purulent skin disease at the vaccination site, the vaccination should be performed after healing. 8, when diarrhea vaccination need to be cautious If the baby’s stool than usual increase, such as more than 4 times a day bowel movements, that is, when diarrhea is also not suitable for polio vaccine. 9, egg allergy baby vaccination has a choice Where the baby is found to be allergic to eggs, it is not appropriate to vaccinate measles, leprosy, mumps, influenza and other vaccines. 10. Babies who are allergic to milk protein or have congenital immune defects should not receive live attenuated polio vaccine orally.