米国における新型コロナウイルス感染症（COVID-19）肺炎はどのようにひどいのか? New COVID-19 pneumonia has become the second leading cause of death in the United States According to a report issued on the 4th by the Institute of Health Indicators and Evaluation of the University of Washington, the new coronary pneumonia has risen to the second leading cause of death in the United …