Covid-19 Effects on Arterial Stiffness and Vascular Aging (CARTESIAN)

Who May Qualify: - age \>18 years, both sexes; - written willing to sign a consent form; - affiliation to a social security regime; - a recent diagnosis of COVID19 (6±3 months) proven by PCR or serology (for group 1,2,3) - hospitalization in intensive care unit for COVID19 (for group 1) - hospitalization in a medicine unit for COVID19 (for group 2) - no hospitalization for COVID19 or hospitalization less than 24h (for group 3) - a negative test for SARS-nCOV2 infection (PCR or serology)(for group 4) Who Should NOT Join This Trial: - Age \<18 years - Inability to express consent of the study - Diseases carrying out a life -expectancy \<1 year according to clinical judgment - Pregnancy and breastfeeding - Foreseen inability to attend scheduled visits Always talk to your doctor about whether this trial is right for you.