Study of seroPREvalence Vis-à-vis SARS-CoV2 and Correlation With Clinical Forms of COVID-19 in Patients Followed in Pneumology in the Cluster Area of the Grand-Est Region (Strasbourg University Hospital)

Inclusion Criteria: * Man or woman from 18 years old and without upper age limit * Patient followed in pulmonology at Strasbourg University Hospital * Patient presenting at least one of the following pathologies: 1. severe persistent asthma (200 patients) 2. chest cancer that is active or has received treatment within a period of less than one year (300 patients) 3. history of lung transplantation performed before the start of the epidemic (02/29/2020) (300 patients) 4. idiopathic or other diffuse interstitial lung disease, sarcoidosis or vasculitis (70 patients) 5. pulmonary arterial hypertension (PAH) (group 1 of the international classification) any cause or chronic thromboembolic PAH (group 4): (60 patients) 6. Severe COPD in the respiratory failure stage (150 patients) * Subject affiliated to a social health insurance protection scheme * Subject able to understand the objectives of the research * Subject having signed an informed consent Exclusion Criteria: * Inability to provide informed information about the subject (subject in an emergency situation, difficulty in understanding the subject, etc.) * Subject under safeguard of justice * Subject under guardianship or guardianship