SARS is triggered by the SARS coronavirus, while the new coronavirus is a brand new virus, and there is a fundamental difference between the two. SARS is the abbreviation of infectious atypical pneumonia, also known as severe acute respiratory syndrome, is an acute respiratory infectious disease caused by SARS coronavirus. It spreads mainly through short-distance droplets, contact with patients’ respiratory secretions and close contact. Infectious atypical pneumonia is fever, headache, muscle pain, fatigue, dry cough with little sputum, diarrhea, etc. as the main clinical manifestations, severe cases of shortness of breath or respiratory distress.SARS virus in the incubation period of the less infectious. New coronavirus also belongs to the genus coronavirus, but it is a new virus different from the SARS coronavirus. It can cause new coronavirus pneumonia, with dry cough, fever and malaise as the main clinical manifestations. Neocoronaviruses are also highly contagious even during the incubation period. New coronavirus and SARS coronavirus are both respiratory viruses. In order to prevent the virus from infecting the human body, it is necessary to get vaccinated as early as possible and take good personal precautions when going out.