First and second COVID-19 waves in Japan: A comparison of disease severity and characteristics - Saito, Sho; Asai, Yusuke; Matsunaga, Nobuaki; Hayakawa, Kayoko; Terada, Mari; Ohtsu, Hiroshi; Tsuzuki, Shinya; Ohmagari, Norio (The Journal of infection, 2021)
Keywords: Characteristics; COVID-19; Humans; Japan - epidemiology; Length of Stay; Letter to the Editor; Mortality; Risk Factors; SARS-CoV-2; Severity; Severity of Illness Index; Japan; Severity; Covid-19; Characteristics; Mortality