key inclusion criteria: 1. hospitalized within the last 36 hours. 2. receiving any form of supplementary oxygen therapy at baseline. 3. confirmed covid-19 viral infection by rtpcr at screening. 4. age: 1. 18-65 years old, or 2. \>65 year-olds can be included after data monitoring committee (dmc) approval key

key inclusion criteria: 1. hospitalized within the last 36 hours. 2. receiving any form of supplementary oxygen therapy at baseline. 3. confirmed covid-19 viral infection by rtpcr at screening. 4. age: 1. 18-65 years old, or 2. \>65 year-olds can be included after data monitoring committee (dmc) approval key

key inclusion criteria: hospitalized within the last 36 hours. receiving any form of supplementary oxygen therapy at baseline. confirmed covid-19 viral infection by rtpcr at screening. age: 18-65 years old, or >65 year-olds can be included after data monitoring committee (dmc) approval key

key inclusion criteria: hospitalized within the last 36 hours. receiving any form of supplementary oxygen therapy at baseline. confirmed covid-19 viral infection by rtpcr at screening. age: 18-65 years old, or >65 year-olds can be included after data monitoring committee (dmc) approval key

key inclusion criteria: hospitalized within the last 36 hours. receiving any form of supplementary oxygen therapy at baseline. confirmed covid-19 viral infection by rtpcr at screening. age: 18-65 years old, or >65 year-olds can be included after dmc approval key

key inclusion criteria: hospitalized within the last 36 hours. receiving any form of supplementary oxygen therapy at baseline. confirmed covid-19 viral infection by rtpcr at screening. age: 18-65 years old, or >65 year-olds can be included after dmc approval key

key inclusion criteria: 1. hospitalized within the last 36 hours. 2. receiving any form of supplementary oxygen therapy at baseline. 3. confirmed covid-19 viral infection by rtpcr at screening. 4. age: 1. 18-65 years old, or 2. >65 year-olds can be included after dmc approval key

key inclusion criteria: 1. hospitalized within the last 36 hours. 2. receiving any form of supplementary oxygen therapy at baseline. 3. confirmed covid-19 viral infection by rtpcr at screening. 4. age: 1. 18-65 years old, or 2. >65 year-olds can be included after dmc approval key