Inclusion Criteria:  Subject included in the Foch Hospital : Patients managed at the Foch Hospital with RT-PCR screening for SARS-CoV-2 infection Healthy volunteers among the hospital staff, asymptomatic, for whom an RT-PCR SARS-CoV-2 is indicated or recommended. Healthy hospital volunteers vaccinated against COVID (full vaccination schedule completed) At least 18 years of age; Fluency in the French language; Have signed a consent form; Be affiliated with a health insurance plan.  Exclusion Criteria:  Pregnant woman Patient deprived of liberty by judicial or administrative decision