Those who are allergic to eggs, gentamicin and kanamycin should not be beaten, those with severe allergies should not be beaten, and those with nervous system diseases, acute diseases and chronic diseases should not be beaten. Those who have been injected with attenuated live vaccine within one month can be injected again every 1 month, those who are catching a cold can be postponed, and those who have been injected with immunoglobulin within three months can be postponed. China has injected measles vaccine for more than 40 years, with few adverse reactions and very safe. After vaccination, with the increase of age, the antibody gradually disappeared and lost its protective effect. Pregnant women are infected with measles virus, and the fetus is prone to deformity. As long as there are no contraindications, active vaccination is good for yourself and the people around you, because measles is a respiratory infectious disease, and it can infect more than a dozen people around one attack.