Inclusion Criteria:  Adults who tested positive for SARS-CoV-2 currently admitted to hospital at the study site Adults who tested negative for SARS-CoV-2 and are admitted for any respiratory condition (eg COPD or asthma flare-up, pneumonia..) Healthy volunteers  Exclusion Criteria:  Patients under the age of 18. Patients unable to read in Italian. Patients unable to give informed consent to participate. Patients requiring life support (including, but not limited to, mechanical cardiac support, ventilation, etc.) Patients who are pregnant