inclusion criteria: * subjects must be 45 years of age or older * provision of informed consent * subjects who tested positive for sars-cov-2 and have clinical symptoms of covid-19\* and have been hospitalized, but are not requiring more than 4 liters/minute of supplemental oxygen by nasal cannula and are not requiring icu/ccu-level care at time of enrollment (\*)acute respiratory tract infection (sudden onset of at least one of the following: fever, chills, sore throat, myalgia, diarrhea, cough, or shortness of breath) and with no other etiology that fully explains the clinical presentation

inclusion criteria: * subjects must be 45 years of age or older * provision of informed consent * subjects who tested positive for sars-cov-2 and have clinical symptoms of covid-19\* and have been hospitalized, but are not requiring more than 4 liters/minute of supplemental oxygen by nasal cannula and are not requiring icu/ccu-level care at time of enrollment (\*)acute respiratory tract infection (sudden onset of at least one of the following: fever, chills, sore throat, myalgia, diarrhea, cough, or shortness of breath) and with no other etiology that fully explains the clinical presentation

inclusion criteria: - subjects must be 45 years of age or older - provision of informed consent - subjects who tested positive for sars-cov-2 and have clinical symptoms of covid-19* and have been hospitalized, but are not requiring more than 4 liters/minute of supplemental oxygen by nasal cannula and are not requiring icu/ccu-level care at time of enrollment (*)acute respiratory tract infection (sudden onset of at least one of the following: fever, chills, sore throat, myalgia, diarrhea, cough, or shortness of breath) and with no other etiology that fully explains the clinical presentation

inclusion criteria: - subjects must be 45 years of age or older - provision of informed consent - subjects who tested positive for sars-cov-2 and have clinical symptoms of covid-19* and have been hospitalized, but are not requiring more than 4 liters/minute of supplemental oxygen by nasal cannula and are not requiring icu/ccu-level care at time of enrollment (*)acute respiratory tract infection (sudden onset of at least one of the following: fever, chills, sore throat, myalgia, diarrhea, cough, or shortness of breath) and with no other etiology that fully explains the clinical presentation