To date, nearly 2 million people, including at least 100,000 in France, have been infected with SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2). This infection is very heterogeneous in nature, ranging from asymptomatic forms to acute respiratory distress syndrome patterns in 6.1% of cases, leading to an estimated overall mortality of 5.2%.

Apart from age, few risk factors for a pejorative evolution have been identified: arterial hypertension, diabetes, cardiovascular history, obesity and chronic respiratory pathology in particular. The median incubation period is 5 days and the median time between the appearance of the first symptoms and the onset of hypoxia requiring admission to intensive care is 7 to 12 days. The mechanisms involved in the occurrence of these secondary worsening patterns are unclear. One hypothesis is that it is related to an inappropriate inflammatory response rather than a direct cytopathic effect of the virus. The objective of this study is to measure the intensity of the T lymphocyte response in patients hospitalized for Cov2 SARS infection in order to determine whether the intensity of the response is associated with worsening of symptoms.

Inclusion Criteria:

• Person having given his or her non-opposition
• Patient hospitalized with an SARS-Cov2 infection proven by virological sampling (nasopharyngeal or sputum PCR) less than 8 days old.

Exclusion Criteria:

• Person subject to a legal protection measure (curatorship, guardianship)
• Person subject to a safeguard measure of justice
• Pregnant, parturient or breastfeeding woman
• Major incapable or incapable of giving consent
• Minor

Patients hospitalized for SARS-Cov-2 infection