Measles is an acute whistling infectious disease caused by measles virus, the main clinical manifestations are fever, cough, runny, ocular conjunctivitis, oral measles mucosal spots and skin maculopapular rash. 1, the infectious source of measles The patient is the only source of infection. Acute patients are the most important source of infection, asymptomatic people with the virus and recessive infections are less common and less infectious. 2 days before the onset of the disease to 5 days after the rash are infectious, the most infectious prodromal period, the rash gradually decreases, the rash is no longer infectious when it subsides. The infectious period patients mouth, nose, throat, eye conjunctiva secretions contain the virus, recovery period does not carry the virus. 2, through what transmission via the inhalation tract droplet transmission. When a patient coughs or sneezes, the virus invades the susceptible person through the mouth, pharynx, nose or conjunctival membranes with the discharged droplets. Can also be transmitted by contaminated hands, generally not indirectly through a third party or clothing. The disease is prevalent among children aged 6 months to 5 years old. Currently, there are more and more reported cases of measles in adults, and even small epidemics in local areas, mainly due to the measles vaccination when they were young, and then not replanted, so that the level of antibodies in the body is reduced and become susceptible. In the first 50 years of the 20th century, there were measles epidemics around the world, and since the introduction of the measles vaccine in the 1960s, the incidence has dropped significantly in countries where vaccination is common. In China, measles epidemics have been effectively controlled since the introduction of universal measles vaccination. During measles epidemics avoid going to public places or crowded places and wear masks when entering and leaving; children with no complications are isolated at home to reduce transmission and secondary hospital infections. The main target of measles vaccine in China is infants and children, but children and adults who have not had measles can be vaccinated with live attenuated measles vaccine. The age of initial vaccination is 8 months.