This is a non-interventional transversal research whose main objective is to quantify the population of reverse migrating neutrophils in patients with COVID-19.~Design:~A multicentric (3 sites) clinical trial~Sample size :~200 patients~Population concerned:~Patients hospitalized in intensive care with SARS-CoV-2 infection confirmed by RT-PCR from a nasopharyngeal swab.~Duration of participation (treatment + follow-up): until the patient is discharged from the ICU and within 2 months top.~No interim analysis is planned. Analysis will be performed at the end of the study.
The main objective is to quantify the population of reverse migrating neutrophils in patients with COVID-19.