patients will be eligible for inclusion if they fulfil all the following criteria: - patients aged ≥ 18 years. - confirmed diagnosis of sars-cov-2 infection by nasal swab, other viral sample (i.e. sputum, bronchoalveolar lavage) or chest imaging suggestive of sars-cov-2 pneumonia (chest x-ray or ct-scan). - requirement for oxygen supplementation. - persistent respiratory symptoms (i.e. dyspnoea, cough) or asthenia. - abnormal 6mwt at 3 months (distance < 90% predicted or desaturation ≥ 3% or borg >5) and/or abnormal lung function as described by the international recommendations patients will be excluded if they: - already had existing severe and symptomatic pulmonary condition before covid-19 pneumonia - are unable to execute the different tests and surveys because of cognitive or physical limitations. - are already included in a structured rehabilitation program - have comorbidities with a life expectancy of less than 12 months. - any relevant acute medical disorder/acute disease state judged by the investigators as likely to represent a risk for the patient to fulfil a rehabilitation program or requiring urgent investigations.

patients will be eligible for inclusion if they fulfil all the following criteria: - patients aged ≥ 18 years. - confirmed diagnosis of sars-cov-2 infection by nasal swab, other viral sample (i.e. sputum, bronchoalveolar lavage) or chest imaging suggestive of sars-cov-2 pneumonia (chest x-ray or ct-scan). - requirement for oxygen supplementation. - persistent respiratory symptoms (i.e. dyspnoea, cough) or asthenia. - abnormal 6mwt at 3 months (distance < 90% predicted or desaturation ≥ 3% or borg >5) and/or abnormal lung function as described by the international recommendations patients will be excluded if they: - already had existing severe and symptomatic pulmonary condition before covid-19 pneumonia - are unable to execute the different tests and surveys because of cognitive or physical limitations. - are already included in a structured rehabilitation program - have comorbidities with a life expectancy of less than 12 months. - any relevant acute medical disorder/acute disease state judged by the investigators as likely to represent a risk for the patient to fulfil a rehabilitation program or requiring urgent investigations.