Many people believe that measles is a simple fever, rash, rest for a few days will recover, in fact, measles is very easy to cause many complications, such as pneumonia, laryngitis, encephalitis, myocarditis, etc., is one of the main causes of death in children. Since the beginning of spring this year, the incidence of measles in children in the city is three times that of last year, and the incidence of measles in adults is also on the rise. So what is measles? What are the ways of transmission of measles? And how should I prevent it? 1. What is measles? Measles is an acute respiratory infectious disease caused by the measles virus and is one of the most common infectious diseases among children, mostly seen in children between the ages of June and 5, with a high incidence in the winter and spring. 2. What are the symptoms of measles? Typical measles can be divided into the following four phases: (1) incubation period of about 6 to 18 days; (2) teeth corresponding to the buccal mucosa, a small gray-white dot of about 1.0 mm in diameter, surrounded by a red halo, called measles mucosal spots, with diagnostic value. However, due to extensive vaccination against measles, some children with measles do not have measles mucous membrane spots; (3) rash period: more than 3 to 4 days after the onset of fever, the rash in the order of the ear, neck, trunk, limbs, hands and feet, and spread throughout the body; (4) recovery period: 3 to 4 days after the onset of the rash, the rash in order to fade, the skin has bran flaking and light brown pigmentation. 3.What are the complications of measles? Can be complicated by pneumonia, laryngitis, myocarditis, encephalitis, some severe measles can cause death. 4, what are the ways of transmission of measles? Patients with measles are the main source of infection, from the end of the incubation period to 5 days after the rash is contagious, in the form of droplets when coughing, sneezing, talking, infecting susceptible people, more contagious. 5.How to prevent measles? The most durable and effective way to prevent measles is to get measles vaccine to obtain protective antibodies, and the immunization procedure for measles vaccine in China is 8 full months of vaccination and replanting at age 7. During the epidemic season, susceptible children should go to public places as little as possible and wear masks when entering public places to reduce the chance of infection and transmission.