Inclusion Criteria:  Hospitalized adult patient ≥ 50 years at the time of admission, Suffering from confirmed COVID-19 (positive quantitative PCR for SARS-CoV-2 and/or chest scanner suggestive of COVID-19), Informed and non-opposed to the research. Patient will be informed of the study by his medical doctor during hospitalization or by post thanks to a generic information sheet dedicated to COVID-19 researches.  Exclusion Criteria:  Adult patient < 50 years at the time of admission Negative quantitative PCR for SARS-Cov-2