摘要
Since December 2019,pneumonia infected by the Corona Virus Disease 2019(COVID-19)has been classified as a Class B infectious disease(Class A management).With the spread of the epidemic,other cases have occurred in other regions of China and globally.The incubation period of the disease is usually 3-7 days,the longest is 14 days.The clinical manifestations are fever,dry cough,fatigue,etc.