麻疹是由麻疹病毒引起的急性呼吸道传染病,发病季节多在冬、春季。患者多为儿童,临床症状有发热、咳嗽、流鼻涕、眼结膜充血、口腔黏膜有麻疹黏膜斑及皮肤出现斑丘疹。随着麻疹疫苗接种的普及,麻疹的发病率大大降低了。但是,近年来我国麻疹发病率又开始增加,而且发病年龄也由小孩 Measles is an acute respiratory infection caused by measles virus. The onset season is mostly in winter and spring. Patients are mostly children, clinical symptoms are fever, cough, runny nose, conjunctival hyperemia, oral mucosa with measles mucosa and skin rash. With the spread of measles vaccination, the incidence of measles is greatly reduced. However, the incidence of measles in China has started to increase again in recent years, and the age of onset is also affected by children