Serious. According to the Lijiang City, Yunnan Province, the epidemic prevention and control center shows that the new coronavirus infectivity increased in the epidemic prevention and control of the critical period of time the situation is still serious and complex, serious. New coronavirus infection will appear fever, cough and phlegm, nasal congestion and runny nose, dry throat and sore throat, gastrointestinal discomfort, body aches and pains, dry cough, decreased sense of smell and so on.