inclusion criteria : participants must be \>=18 years of age. participants must be hospitalized for less than or equal to 7 days with evidence of pneumonia and have one of the following disease categories: severe disease or critical disease. laboratory-confirmed severe acute respiratory syndrome coronavirus 2 infection.

inclusion criteria : participants must be \>=18 years of age. participants must be hospitalized for less than or equal to 7 days with evidence of pneumonia and have one of the following disease categories: severe disease or critical disease. laboratory-confirmed severe acute respiratory syndrome coronavirus 2 infection.

inclusion criteria : participants must be >=18 years of age. participants must be hospitalized for less than or equal to 7 days with evidence of pneumonia and have one of the following disease categories: severe disease or critical disease. laboratory-confirmed severe acute respiratory syndrome coronavirus 2 infection.

inclusion criteria : participants must be >=18 years of age. participants must be hospitalized for less than or equal to 7 days with evidence of pneumonia and have one of the following disease categories: severe disease or critical disease. laboratory-confirmed severe acute respiratory syndrome coronavirus 2 infection.

inclusion criteria : participants must be ≥18 years of age participants must be hospitalized for less than or equal to 7 days with evidence of pneumonia and have one of the following disease categories: severe disease or critical disease laboratory-confirmed sars-cov-2 infection

inclusion criteria : participants must be ≥18 years of age participants must be hospitalized for less than or equal to 7 days with evidence of pneumonia and have one of the following disease categories: severe disease or critical disease laboratory-confirmed sars-cov-2 infection