Observational, prospective, multicentre cohort of patients followed up after hospitalisation to evaluate respiratory sequelae subsequent to SARS-CoV-2 (COVID-19) infection FRESH-PEF73765-en MARIE DIESEL Observational, prospective, multicentre cohort of patients followed up after hospitalisation to evaluate respiratory sequelae subsequent to SARS-CoV-2 (COVID-19) infection SISCOVID FRESH-PEF73765-en 73765 FRESH-PEF73765 George CALCAIANU GROUPE HOSPITALIER DE LA REGION DE MULHOUSE ET SUD ALSACE (GHRMSA) Epidemiology France Portal (PEF) null George;CALCAIANU Pulmonary medicine Viral pneumonia COVID-19 Evaluate the respiratory sequelae after SARS-CoV-2 infection in patients hospitalised for severe COVID-19 pneumonia requiring O2, with subsequent outpatient follow-up (6 months) by: - Low-dose chest CT scan (LD-chest CT), - Static lung function tests (LFT), - Arterial blood gases in ambient air at rest (AA BG) and/or with oxygen (O2 BG), - 6-minute walking test in ambient air (6WT AA) and/or with oxygen (6WT O2) null France Individuals Patients population Male Female Young Adult (19 to 24 years) Adult (25 to 44 years) Middle Aged (45 to 64 years) Aged (65 to 79 years) Aged, 80 and over (80 years and more) Patient having received verbal information and not objecting to the study Age >= 18 years inclusive Patient hospitalised for severe COVID-19 pneumonia requiring O2 Patient having contracted SARS-CoV-2 infection proven by RT-PCR and/or retrospective serology and/or COVID-19 syndrome with chest CT scan consistent with infection (over the period from 1 March 2020 to 30 June 2020) Clinical data Biological data Other < 500 individuals Converting or copying information into a structured record Interview with the participant (including clinical) Observational Study Observational Study Unknown To be defined