inclusion criteria: * covid-19 infected patient * age 18 years or older * presence of pneumonia * pao2/fio2 \< 300 mm hg or spo2 \< 93% in air ambient or need to supplementary oxygen administration in order to maintain spo2 range in \[94-98%\] or lung infiltrates \> 50% * medical insurance

inclusion criteria: * covid-19 infected patient * age 18 years or older * presence of pneumonia * pao2/fio2 \< 300 mm hg or spo2 \< 93% in air ambient or need to supplementary oxygen administration in order to maintain spo2 range in \[94-98%\] or lung infiltrates \> 50% * medical insurance

inclusion criteria: - covid-19 infected patient - age 18 years or older - presence of pneumonia - pao2/fio2 < 300 mm hg or spo2 < 93% in air ambient or need to supplementary oxygen administration in order to maintain spo2 range in [94-98%] or lung infiltrates > 50% - medical insurance

inclusion criteria: - covid-19 infected patient - age 18 years or older - presence of pneumonia - pao2/fio2 < 300 mm hg or spo2 < 93% in air ambient or need to supplementary oxygen administration in order to maintain spo2 range in [94-98%] or lung infiltrates > 50% - medical insurance