SARS is the severe acute respiratory syndrome (SARS) caused by the SARS coronavirus, which was effectively controlled after the epidemic in 2003. The main reason why it was effectively controlled was that effective isolation was implemented for the source of infection and the transmission route was completely cut off. In addition, protective measures such as wearing masks, washing hands regularly, and paying attention to opening windows and ventilation were taken for susceptible people. The source of SARS infection is the patient, and the transmission routes include short-distance respiratory droplet transmission, aerosol transmission, and direct contact transmission. After isolating the patient, contact with the outside world is completely cut off, and the above-mentioned transmission routes are naturally cut off. Mild to moderate patients can completely eliminate SARS coronavirus in their bodies through their own immunity. Severely ill patients cannot eliminate the virus through their own immunity and will eventually face death, and the virus can be removed after cremation of the patient’s body. The general public has taken protective measures such as wearing masks, washing hands frequently and paying attention to opening windows and ventilation to reduce the possibility of being infected so that SARS coronavirus can disappear completely. For other acute infectious diseases, the use of measures to isolate the source of infection, cut off the transmission route and protect susceptible people are still no less effective basic measures. Although the SARS virus has been effectively controlled, other new viruses may appear at any time. We need to develop good hygiene habits in our daily life and should pay attention to personal hygiene, environmental hygiene and dietary hygiene. At the same time, we should pay attention to nutrition, and it is recommended to supplement nutrients such as protein, vitamins and trace elements, and to exercise to enhance physical fitness in order to improve our immunity so that we can better cope with new and sudden infectious diseases.