Although the novel coronavirus and SARS virus belong to the same coronavirus family, in general, the novel coronavirus is not as serious as SARS. The SARS outbreak in 2003 had an extremely high fatality rate of 10%, while the novel coronavirus outbreak in 2020 had a much lower fatality rate than SARS virus. In addition patients who have been infected by SARS virus, even if they recovered, have lifelong sequelae due to the use of a large amount of hormones during treatment, while the treatment process of the novel coronavirus, which does not reach a large amount of hormones, can be exempted from some of the sequelae.