inclusion criteria: 1. male or female of 50-85 years of age 2. subjects with recent covid-19 diagnosis (within 72 hours), that are symptomatic (fever, cough, sob, weakness, or other flu-like symptoms). 3. agrees to comply with study procedures (diary, oximeter readings, telephone follow up). 4. has given voluntary, written, informed consent to participate in the study. 5. identifies as african american or hispanic origin 6. patients must have at least 1 risk factor (history of hypertension (bp\> 140/99) chf, angina, prior mi, coronary angiography with one significantly occluded vessel, diabetes mellitus, obesity, or smoking, (for at least 5 years).

inclusion criteria: 1. male or female of 50-85 years of age 2. subjects with recent covid-19 diagnosis (within 72 hours), that are symptomatic (fever, cough, sob, weakness, or other flu-like symptoms). 3. agrees to comply with study procedures (diary, oximeter readings, telephone follow up). 4. has given voluntary, written, informed consent to participate in the study. 5. identifies as african american or hispanic origin 6. patients must have at least 1 risk factor (history of hypertension (bp\> 140/99) chf, angina, prior mi, coronary angiography with one significantly occluded vessel, diabetes mellitus, obesity, or smoking, (for at least 5 years).

inclusion criteria: male or female of 50-85 years of age subjects with recent covid-19 diagnosis (within 72 hours), that are symptomatic (fever, cough, sob, weakness, or other flu-like symptoms). agrees to comply with study procedures (diary, oximeter readings, telephone follow up). has given voluntary, written, informed consent to participate in the study. identifies as african american or hispanic origin patients must have at least 1 risk factor (history of hypertension (bp> 140/99) chf, angina, prior mi, coronary angiography with one significantly occluded vessel, diabetes mellitus, obesity, or smoking, (for at least 5 years).

inclusion criteria: male or female of 50-85 years of age subjects with recent covid-19 diagnosis (within 72 hours), that are symptomatic (fever, cough, sob, weakness, or other flu-like symptoms). agrees to comply with study procedures (diary, oximeter readings, telephone follow up). has given voluntary, written, informed consent to participate in the study. identifies as african american or hispanic origin patients must have at least 1 risk factor (history of hypertension (bp> 140/99) chf, angina, prior mi, coronary angiography with one significantly occluded vessel, diabetes mellitus, obesity, or smoking, (for at least 5 years).

inclusion criteria: 1. male or female of 50-85 years of age 2. subjects with recent covid-19 diagnosis (within 72 hours), that are symptomatic (fever, cough, sob, weakness, or other flu-like symptoms). 3. agrees to comply with study procedures (diary, oximeter readings, telephone follow up). 4. has given voluntary, written, informed consent to participate in the study. 5. identifies as african american or hispanic origin 6. patients must have at least 1 risk factor (history of hypertension (bp> 140/99) chf, angina, prior mi, coronary angiography with one significantly occluded vessel, diabetes mellitus, obesity, or smoking, (for at least 5 years).

inclusion criteria: 1. male or female of 50-85 years of age 2. subjects with recent covid-19 diagnosis (within 72 hours), that are symptomatic (fever, cough, sob, weakness, or other flu-like symptoms). 3. agrees to comply with study procedures (diary, oximeter readings, telephone follow up). 4. has given voluntary, written, informed consent to participate in the study. 5. identifies as african american or hispanic origin 6. patients must have at least 1 risk factor (history of hypertension (bp> 140/99) chf, angina, prior mi, coronary angiography with one significantly occluded vessel, diabetes mellitus, obesity, or smoking, (for at least 5 years).

inclusion criteria: 1. male or female of 50-85 years of age 2. subjects with recent covid-19 diagnosis (within 72 hours), that are symptomatic (fever, cough, sob, weakness, or other flu-like symptoms). 3. agrees to comply with study procedures (diary, oximeter readings, telephone follow up). 4. has given voluntary, written, informed consent to participate in the study. 5. identifies as african american. 6. patients must have at least 1 risk factor (history of hypertension (bp> 140/99) chf, angina, prior mi, coronary angiography with one significantly occluded vessel, diabetes mellitus, obesity, or smoking, (for at least 5 years).

inclusion criteria: 1. male or female of 50-85 years of age 2. subjects with recent covid-19 diagnosis (within 72 hours), that are symptomatic (fever, cough, sob, weakness, or other flu-like symptoms). 3. agrees to comply with study procedures (diary, oximeter readings, telephone follow up). 4. has given voluntary, written, informed consent to participate in the study. 5. identifies as african american. 6. patients must have at least 1 risk factor (history of hypertension (bp> 140/99) chf, angina, prior mi, coronary angiography with one significantly occluded vessel, diabetes mellitus, obesity, or smoking, (for at least 5 years).