inclusion criteria: * adults patients aged 80 years or less * covid-19 diagnosis defined as either positive rt-pcr for sars-cov-2 or covid-19 compatible or typical chest ct pattern or positive serology for covid-19 antibodies * hypoxemic acute respiratory failure with the following criteria: oxygen saturation level of 92% or less, as measured by pulsed oximetry (spo2) under oxygen therapy with an oxygen rate of 6l/min or more. * hospital admission for covid-19 within 14 days * patients affiliated

inclusion criteria: * adults patients aged 80 years or less * covid-19 diagnosis defined as either positive rt-pcr for sars-cov-2 or covid-19 compatible or typical chest ct pattern or positive serology for covid-19 antibodies * hypoxemic acute respiratory failure with the following criteria: oxygen saturation level of 92% or less, as measured by pulsed oximetry (spo2) under oxygen therapy with an oxygen rate of 6l/min or more. * hospital admission for covid-19 within 14 days * patients affiliated

inclusion criteria: - adults patients aged 80 years or less - covid-19 diagnosis defined as either positive rt-pcr for sars-cov-2 or covid-19 compatible or typical chest ct pattern or positive serology for covid-19 antibodies - hypoxemic acute respiratory failure with the following criteria: oxygen saturation level of 92% or less, as measured by pulsed oximetry (spo2) under oxygen therapy with an oxygen rate of 6l/min or more. - hospital admission for covid-19 within 14 days - patients affiliated

inclusion criteria: - adults patients aged 80 years or less - covid-19 diagnosis defined as either positive rt-pcr for sars-cov-2 or covid-19 compatible or typical chest ct pattern or positive serology for covid-19 antibodies - hypoxemic acute respiratory failure with the following criteria: oxygen saturation level of 92% or less, as measured by pulsed oximetry (spo2) under oxygen therapy with an oxygen rate of 6l/min or more. - hospital admission for covid-19 within 14 days - patients affiliated

inclusion criteria: - adults patients aged 80 years or less - covid-19 diagnosis in the past 14 days defined as either positive rt-pcr for sars-cov-2 or covid-19 compatible or typical chest ct pattern or positive serology for covid-19 antibodies - hypoxemic acute respiratory failure with the following criteria: oxygen saturation level of 92% or less, as measured by pulsed oximetry (spo2) under oxygen therapy with an oxygen rate of 6l/min or more. - hospital admission for covid-19 within 14 days - patients affiliated

inclusion criteria: - adults patients aged 80 years or less - covid-19 diagnosis in the past 14 days defined as either positive rt-pcr for sars-cov-2 or covid-19 compatible or typical chest ct pattern or positive serology for covid-19 antibodies - hypoxemic acute respiratory failure with the following criteria: oxygen saturation level of 92% or less, as measured by pulsed oximetry (spo2) under oxygen therapy with an oxygen rate of 6l/min or more. - hospital admission for covid-19 within 14 days - patients affiliated

inclusion criteria: - adults patients aged 75 years or less - covid-19 diagnosis in the past 14 days defined as either positive rt-pcr for sars-cov-2 or covid-19 compatible or typical chest ct pattern or positive serology for covid-19 antibodies - hypoxemic acute respiratory failure with the following criteria: oxygen saturation level of 92% or less, as measured by pulsed oximetry (spo2) under oxygen therapy with an oxygen rate of 6l/min or more. - hospital admission within 14 days - patients affiliated to french social security ("ame" excepted)

inclusion criteria: - adults patients aged 75 years or less - covid-19 diagnosis in the past 14 days defined as either positive rt-pcr for sars-cov-2 or covid-19 compatible or typical chest ct pattern or positive serology for covid-19 antibodies - hypoxemic acute respiratory failure with the following criteria: oxygen saturation level of 92% or less, as measured by pulsed oximetry (spo2) under oxygen therapy with an oxygen rate of 6l/min or more. - hospital admission within 14 days - patients affiliated to french social security ("ame" excepted)