inclusion criteria: - sars-cov-2 confirmed infection; - admission to a hospital; - expected hospitalization in the center for at least for 24 hs; - oxygen saturation >90% breathing without oxygen supplement; - age at least 45 years or the presence of one of the followings risk factors: - hypertension; - diabetes (type i o ii); - at least moderate copd or asthma; - cardiovascular disease (history of myocardial infarction, coronary angioplasty, coronary artery bypass grafting or valve replacement surgery); - body mass index >=30; - signed written consent.

inclusion criteria: - sars-cov-2 confirmed infection; - admission to a hospital; - expected hospitalization in the center for at least for 24 hs; - oxygen saturation >90% breathing without oxygen supplement; - age at least 45 years or the presence of one of the followings risk factors: - hypertension; - diabetes (type i o ii); - at least moderate copd or asthma; - cardiovascular disease (history of myocardial infarction, coronary angioplasty, coronary artery bypass grafting or valve replacement surgery); - body mass index >=30; - signed written consent.

inclusion criteria: - sars-cov-2 confirmed infection; - admission to a hospital in the last 24 hs; - expected hospitalization in the center for at least for 24 hs; - oxygen saturation >90% breathing without oxygen supplement; - age at least 45 years or the presence of one of the followings risk factors: - hypertension; - diabetes (type i o ii); - at least moderate copd or asthma; - cardiovascular disease (history of myocardial infarction, coronary angioplasty, coronary artery bypass grafting or valve replacement surgery); - signed written consent.

inclusion criteria: - sars-cov-2 confirmed infection; - admission to a hospital in the last 24 hs; - expected hospitalization in the center for at least for 24 hs; - oxygen saturation >90% breathing without oxygen supplement; - age at least 45 years or the presence of one of the followings risk factors: - hypertension; - diabetes (type i o ii); - at least moderate copd or asthma; - cardiovascular disease (history of myocardial infarction, coronary angioplasty, coronary artery bypass grafting or valve replacement surgery); - signed written consent.