Receiver operating characteristic curves for PSI, CURB65, MuLBSTA, and qSOFA scores for in-hospital mortality in COVID19 pneumonia patients. PSI: Pneumonia Severity Index; CURB-65: Confusion, Urea, Respiratory rate, Blood pressure, and age ≥65 years; MuLBSTA: Multilobar infiltration, hypo-Lymphocytosis, Bacterial coinfection, Smoking history, hyper-Tension and Age; qSOFA: quick Sequential Organ Failure Assessment; COVID-19: coronavirus infectious disease 2019.