Inclusion Criteria:  A- For COVID cases:  Consultation in a city doctor's office Positive SARS-CoV-2 RT-PCR result OR positive SARS-CoV-2 serology Patient symptomatic or not  Definition of symptomatic :  Anosmia OR CT scan suggestive of COVID 19 OR ≥ 2 symptoms contemporaneous with virologic sampling among: asthenia, cough, dyspnea, fever, myalgias, dysgeusia, diarrhea AND not present previously at diagnosis  B-. For NON COVID cases:  Consultation in a city doctor's office No known COVID+ serology No known RT- PCR SARS-CoV-2 No clinical suspicion of COVID-19 infection  Exclusion Criteria:  Minor patient Refusal to participate Patient under protection Patient requiring hospitalization for COVID-19 (excluding non-emergency hospitalization) Patient consulted for the following reason only: treatment monitoring, treatment renewal or certificate, hospital discharge