SARS refers to the SARS virus infection, SARS is a coronavirus, is an RNA virus with an envelope, the incubation period of the SARS virus is usually within two weeks, most people are in the 2-10 days, human beings are universally susceptible, swept across the world in 2003, the main culprit of the SARS is the SARS virus, highly contagious, infected by the SARS virus with a rapid onset of disease, rapid transmission, high morbidity and mortality rate. Most of the infected patients have a history of direct or indirect contact with the patient, clinically manifested as hypoxia, cyanosis, high fever above 38 ℃, accelerated respiration or respiratory distress syndrome, chest X-ray can suggest different degrees of lung changes, there is still no effective drugs to cure SARS virus.