New coronavirus detection (clinical or paraclinical) Oxygen saturation less than 90% Written consent to participate in the study Age over 18 years Moderate to severe Covid-19 disease is hospitalized and requires respiratory support

New coronavirus detection (clinical or paraclinical) Oxygen saturation less than 90% Written consent to participate in the study Age over 18 years Moderate to severe Covid-19 disease is hospitalized and requires respiratory support