 The recent outbreak of coronavirus disease COVID-19 has been compared to the severe acute respiratory syndrome SARS outbreak in 2003. This study found that older age and a high number of comorbidities were associated with higher severity and mortality in patients with both COVID-19 and SARS. Men had a higher risk of worse outcomes and death than women regardless of their age. This article was authored by Jianmin Jin, Jianmin Jin, Peng Bai, and others.