Development and Validation of a Clinical Risk Score to Predict the Occurrence of Critical Illness in Hospitalized Patients With COVID-19

Abstract
The outbreak of the novel coronavirus disease 2019 (COVID-19) began in Wuhan, China in December 2019. Since then, it has rapidly spread around the world. As of April 16, 2020, the WHO reported a total of 1 995 983 COVID-19 cases globally, with average mortality of 6.57%.