COVID-19(31) SARS-CoV-2(14) pandemic(10) Patient(9) Tocilizumab(7) COVID-19 patient(6) performed(6) patients(6) Tuberculosis(5) Impact(5) Respiratory failure(5) death(5) Analysis(5) Evidence(4) Acute respiratory failure(4) High flow nasal cannula(4) Treatment(4) Epidemic season(4) collected(4) increase in(4) median(4) conducted(4) ICU(4) Influenza(4) coronavirus disease(4) Result(4) COVID-19, Coronavirus disease 2019(4) Observed(3) blockade(3) diagnostic(3)