Medium and Long Term Follow-up of COVID-19 Infected Patients: Research and Characterization of Pulmonary Sequelae

Inclusion Criteria: * Patient infected by SARS-CoV-2 (diagnosed by RT-PCR and / or typical CT imaging) * Patient hospitalized in the intensive care units of Besançon or Dijon hospitals for severe SARS-CoV-2 pneumonia * Postmenopausal woman for at least 24 months or surgically sterilized, or, for woman of childbearing age, use of an effective method of contraception * Signature of informed consent to participate indicating that the subject has understood the purpose and the procedures required by the study and that he agrees to participate in the study. * Affiliation to a French social security system . Exclusion Criteria: * Chronic respiratory failure under long-term oxygen therapy * Known diffuse invasive pneumonia * Life expectancy estimated at less than one year by the doctor * Legal incapacity or limited legal capacity * History of psychiatric illness, intellectual disability, lack of motivation or other conditions that may limit the understanding of informed consent * Subject unlikely to cooperate in the study and / or weak cooperation anticipated by the investigator * Subject without health insurance * Pregnant and / or lactating woman * Subject being in the exclusion period of another study or foreseen by the "national file of the volunteers".