inclusion criteria: * hospitalized adult patients with pneumonia evidenced by chest ct scan. * laboratory (rt-pcr) confirmed infection with 2019-ncov or strongly suspected to be infected with sars-cov2 with confirmation studies pending. * and at least one of the following: 1. respiratory frequency ≥30/min. 2. blood oxygen saturation ≤93% on room air (ra). 3. partial pressure of arterial oxygen to fraction of inspired oxygen ratio (pao2/fio2) \<300. 4. worsening of lung involvement, defined as an increase in number and/or extension of pulmonary areas of consolidation, need for increased fio2 to maintain stable o2 saturation, or worsening o2 saturation of \>3% with stable fio2.

inclusion criteria: * hospitalized adult patients with pneumonia evidenced by chest ct scan. * laboratory (rt-pcr) confirmed infection with 2019-ncov or strongly suspected to be infected with sars-cov2 with confirmation studies pending. * and at least one of the following: 1. respiratory frequency ≥30/min. 2. blood oxygen saturation ≤93% on room air (ra). 3. partial pressure of arterial oxygen to fraction of inspired oxygen ratio (pao2/fio2) \<300. 4. worsening of lung involvement, defined as an increase in number and/or extension of pulmonary areas of consolidation, need for increased fio2 to maintain stable o2 saturation, or worsening o2 saturation of \>3% with stable fio2.

inclusion criteria: hospitalized adult patients with pneumonia evidenced by chest ct scan. laboratory (rt-pcr) confirmed infection with 2019-ncov or strongly suspected to be infected with sars-cov2 with confirmation studies pending. and at least one of the following: respiratory frequency ≥30/min. blood oxygen saturation ≤93% on room air (ra). partial pressure of arterial oxygen to fraction of inspired oxygen ratio (pao2/fio2) <300. worsening of lung involvement, defined as an increase in number and/or extension of pulmonary areas of consolidation, need for increased fio2 to maintain stable o2 saturation, or worsening o2 saturation of >3% with stable fio2.

inclusion criteria: hospitalized adult patients with pneumonia evidenced by chest ct scan. laboratory (rt-pcr) confirmed infection with 2019-ncov or strongly suspected to be infected with sars-cov2 with confirmation studies pending. and at least one of the following: respiratory frequency ≥30/min. blood oxygen saturation ≤93% on room air (ra). partial pressure of arterial oxygen to fraction of inspired oxygen ratio (pao2/fio2) <300. worsening of lung involvement, defined as an increase in number and/or extension of pulmonary areas of consolidation, need for increased fio2 to maintain stable o2 saturation, or worsening o2 saturation of >3% with stable fio2.

inclusion criteria: - hospitalized adult patients with pneumonia evidenced by chest ct scan. - laboratory (rt-pcr) confirmed infection with 2019-ncov or strongly suspected to be infected with sars-cov2 with confirmation studies pending. - and at least one of the following: 1. respiratory frequency ≥30/min. 2. blood oxygen saturation ≤93% on room air (ra). 3. partial pressure of arterial oxygen to fraction of inspired oxygen ratio (pao2/fio2) <300. 4. worsening of lung involvement, defined as an increase in number and/or extension of pulmonary areas of consolidation, need for increased fio2 to maintain stable o2 saturation, or worsening o2 saturation of >3% with stable fio2.

inclusion criteria: - hospitalized adult patients with pneumonia evidenced by chest ct scan. - laboratory (rt-pcr) confirmed infection with 2019-ncov or strongly suspected to be infected with sars-cov2 with confirmation studies pending. - and at least one of the following: 1. respiratory frequency ≥30/min. 2. blood oxygen saturation ≤93% on room air (ra). 3. partial pressure of arterial oxygen to fraction of inspired oxygen ratio (pao2/fio2) <300. 4. worsening of lung involvement, defined as an increase in number and/or extension of pulmonary areas of consolidation, need for increased fio2 to maintain stable o2 saturation, or worsening o2 saturation of >3% with stable fio2.