inclusion criteria: 1. agree to participate in the trial by signing the irb approved informed consent 2. age ≥ 18 years of age 3. positive diagnosis for covid-19 by sars-cov-2 pcr by nasopharyngeal swab within the past 3 days 4. two or more covid-19 symptoms (at least one of which must be respiratory) rated mild or moderate on the covid-19 adapted flu-pro plus scale 5. spo2 ≥ 94% 6. ambulatory (not hospitalized) at the time of enrollment 7. normal (or stable if abnormal per comorbidity) baseline ecg 8. men of child-bearing potential must use birth control with heterosexual partner(s) (abstinence or condoms) 9. women of child-bearing potential must meet all the following criteria: * use of birth control (abstinence, oral contraceptives, condoms, or intrauterine device) * test negative for β-subunit of hcg

inclusion criteria: 1. agree to participate in the trial by signing the irb approved informed consent 2. age ≥ 18 years of age 3. positive diagnosis for covid-19 by sars-cov-2 pcr by nasopharyngeal swab within the past 3 days 4. two or more covid-19 symptoms (at least one of which must be respiratory) rated mild or moderate on the covid-19 adapted flu-pro plus scale 5. spo2 ≥ 94% 6. ambulatory (not hospitalized) at the time of enrollment 7. normal (or stable if abnormal per comorbidity) baseline ecg 8. men of child-bearing potential must use birth control with heterosexual partner(s) (abstinence or condoms) 9. women of child-bearing potential must meet all the following criteria: * use of birth control (abstinence, oral contraceptives, condoms, or intrauterine device) * test negative for β-subunit of hcg

inclusion criteria: agree to participate in the trial by signing the irb approved informed consent age ≥ 18 years of age positive diagnosis for covid-19 by sars-cov-2 pcr by nasopharyngeal swab within the past 3 days two or more covid-19 symptoms (at least one of which must be respiratory) rated mild or moderate on the covid-19 adapted flu-pro plus scale spo2 ≥ 94% ambulatory (not hospitalized) at the time of enrollment normal (or stable if abnormal per comorbidity) baseline ecg men of child-bearing potential must use birth control with heterosexual partner(s) (abstinence or condoms) women of child-bearing potential must meet all the following criteria: use of birth control (abstinence, oral contraceptives, condoms, or intrauterine device) test negative for β-subunit of hcg

inclusion criteria: agree to participate in the trial by signing the irb approved informed consent age ≥ 18 years of age positive diagnosis for covid-19 by sars-cov-2 pcr by nasopharyngeal swab within the past 3 days two or more covid-19 symptoms (at least one of which must be respiratory) rated mild or moderate on the covid-19 adapted flu-pro plus scale spo2 ≥ 94% ambulatory (not hospitalized) at the time of enrollment normal (or stable if abnormal per comorbidity) baseline ecg men of child-bearing potential must use birth control with heterosexual partner(s) (abstinence or condoms) women of child-bearing potential must meet all the following criteria: use of birth control (abstinence, oral contraceptives, condoms, or intrauterine device) test negative for β-subunit of hcg

inclusion criteria: agree to participate in the trial by signing the irb approved informed consent age ≥ 18 years of age positive diagnosis for covid-19 by sars-cov-2 pcr by nasopharyngeal swab within the past 3 days two or more covid-19 symptoms (at least one of which must be respiratory) rated mild or moderate on the covid-19 adapted flu-pro plus scale spo2 ≥ 94% ambulatory (not hospitalized) at the time of enrollment at increased risk of developing more severe covid-19 disease (at least one of the following): age ≥60 years presence of pulmonary disease, specifically moderate or severe persistent asthma, chronic obstructive pulmonary disease, pulmonary hypertension, emphysema diabetes mellitus (type 1 or 2), requiring oral medication or insulin for treatment cardiovascular disease, including hypertension, requiring at least 1 oral medication for treatment; congestive heart failure; coronary artery disease; cardiomyopathy; pulmonary hypertension body mass index ≥30 chronic renal disease (but not on dialysis) sickle cell disease or trait comorbid disease (as above) well controlled/stable in opinion of the investigator normal (or stable if abnormal per comorbidity) baseline ecg men of child-bearing potential must use birth control with heterosexual partner(s) (abstinence or condoms) women of child-bearing potential must meet all the following criteria: use of birth control (abstinence, oral contraceptives, condoms, or intrauterine device) test negative for β-subunit of hcg

inclusion criteria: agree to participate in the trial by signing the irb approved informed consent age ≥ 18 years of age positive diagnosis for covid-19 by sars-cov-2 pcr by nasopharyngeal swab within the past 3 days two or more covid-19 symptoms (at least one of which must be respiratory) rated mild or moderate on the covid-19 adapted flu-pro plus scale spo2 ≥ 94% ambulatory (not hospitalized) at the time of enrollment at increased risk of developing more severe covid-19 disease (at least one of the following): age ≥60 years presence of pulmonary disease, specifically moderate or severe persistent asthma, chronic obstructive pulmonary disease, pulmonary hypertension, emphysema diabetes mellitus (type 1 or 2), requiring oral medication or insulin for treatment cardiovascular disease, including hypertension, requiring at least 1 oral medication for treatment; congestive heart failure; coronary artery disease; cardiomyopathy; pulmonary hypertension body mass index ≥30 chronic renal disease (but not on dialysis) sickle cell disease or trait comorbid disease (as above) well controlled/stable in opinion of the investigator normal (or stable if abnormal per comorbidity) baseline ecg men of child-bearing potential must use birth control with heterosexual partner(s) (abstinence or condoms) women of child-bearing potential must meet all the following criteria: use of birth control (abstinence, oral contraceptives, condoms, or intrauterine device) test negative for β-subunit of hcg

inclusion criteria: 1. agree to participate in the trial by signing the irb approved informed consent 2. age ≥ 18 years of age 3. positive diagnosis for covid-19 by sars-cov-2 pcr by nasopharyngeal swab within the past 3 days 4. two or more covid-19 symptoms (at least one of which must be respiratory) rated mild or moderate on the covid-19 adapted flu-pro plus scale 5. spo2 ≥ 94% 6. ambulatory (not hospitalized) at the time of enrollment 7. at increased risk of developing more severe covid-19 disease (at least one of the following): 1. age ≥60 years 2. presence of pulmonary disease, specifically moderate or severe persistent asthma, chronic obstructive pulmonary disease, pulmonary hypertension, emphysema 3. diabetes mellitus (type 1 or 2), requiring oral medication or insulin for treatment 4. cardiovascular disease, including hypertension, requiring at least 1 oral medication for treatment; congestive heart failure; coronary artery disease; cardiomyopathy; pulmonary hypertension 5. body mass index ≥30 6. chronic renal disease (but not on dialysis) 7. sickle cell disease or trait 8. comorbid disease (as above) well controlled/stable in opinion of the investigator 9. normal (or stable if abnormal per comorbidity) baseline ecg 10. men of child-bearing potential must use birth control with heterosexual partner(s) (abstinence or condoms) 11. women of child-bearing potential must meet all the following criteria: - use of birth control (abstinence, oral contraceptives, condoms, or intrauterine device) - test negative for β-subunit of hcg

inclusion criteria: 1. agree to participate in the trial by signing the irb approved informed consent 2. age ≥ 18 years of age 3. positive diagnosis for covid-19 by sars-cov-2 pcr by nasopharyngeal swab within the past 3 days 4. two or more covid-19 symptoms (at least one of which must be respiratory) rated mild or moderate on the covid-19 adapted flu-pro plus scale 5. spo2 ≥ 94% 6. ambulatory (not hospitalized) at the time of enrollment 7. at increased risk of developing more severe covid-19 disease (at least one of the following): 1. age ≥60 years 2. presence of pulmonary disease, specifically moderate or severe persistent asthma, chronic obstructive pulmonary disease, pulmonary hypertension, emphysema 3. diabetes mellitus (type 1 or 2), requiring oral medication or insulin for treatment 4. cardiovascular disease, including hypertension, requiring at least 1 oral medication for treatment; congestive heart failure; coronary artery disease; cardiomyopathy; pulmonary hypertension 5. body mass index ≥30 6. chronic renal disease (but not on dialysis) 7. sickle cell disease or trait 8. comorbid disease (as above) well controlled/stable in opinion of the investigator 9. normal (or stable if abnormal per comorbidity) baseline ecg 10. men of child-bearing potential must use birth control with heterosexual partner(s) (abstinence or condoms) 11. women of child-bearing potential must meet all the following criteria: - use of birth control (abstinence, oral contraceptives, condoms, or intrauterine device) - test negative for β-subunit of hcg

inclusion criteria: 1. agree to participate in the trial by signing the irb approved informed consent 2. age ≥ 18 years of age 3. positive diagnosis for covid-19 by sars-cov-2 pcr by nasopharyngeal swab within the past 3 days 4. two or more covid-19 symptoms (at least one of which must be respiratory) rated mild or moderate on the covid-19 adapted flu-pro plus scale 5. spo2 ≥ 94 mm hg 6. ambulatory (not hospitalized) at the time of enrollment 7. at increased risk of developing more severe covid-19 disease (at least one of the following): 1. age ≥60 years 2. presence of pulmonary disease, specifically moderate or severe persistent asthma, chronic obstructive pulmonary disease, pulmonary hypertension, emphysema 3. diabetes mellitus (type 1 or 2), requiring oral medication or insulin for treatment 4. cardiovascular disease, including hypertension, requiring at least 1 oral medication for treatment; congestive heart failure; coronary artery disease; cardiomyopathy; pulmonary hypertension 5. body mass index ≥30 6. chronic renal disease (but not on dialysis) 7. sickle cell disease or trait 8. comorbid disease (as above) well controlled/stable in opinion of the investigator 9. normal (or stable if abnormal per comorbidity) baseline ecg 10. men of child-bearing potential must use birth control with heterosexual partner(s) (abstinence or condoms) 11. women of child-bearing potential must meet all the following criteria: - use of birth control (abstinence, oral contraceptives, condoms, or intrauterine device) - test negative for β-subunit of hcg

inclusion criteria: 1. agree to participate in the trial by signing the irb approved informed consent 2. age ≥ 18 years of age 3. positive diagnosis for covid-19 by sars-cov-2 pcr by nasopharyngeal swab within the past 3 days 4. two or more covid-19 symptoms (at least one of which must be respiratory) rated mild or moderate on the covid-19 adapted flu-pro plus scale 5. spo2 ≥ 94 mm hg 6. ambulatory (not hospitalized) at the time of enrollment 7. at increased risk of developing more severe covid-19 disease (at least one of the following): 1. age ≥60 years 2. presence of pulmonary disease, specifically moderate or severe persistent asthma, chronic obstructive pulmonary disease, pulmonary hypertension, emphysema 3. diabetes mellitus (type 1 or 2), requiring oral medication or insulin for treatment 4. cardiovascular disease, including hypertension, requiring at least 1 oral medication for treatment; congestive heart failure; coronary artery disease; cardiomyopathy; pulmonary hypertension 5. body mass index ≥30 6. chronic renal disease (but not on dialysis) 7. sickle cell disease or trait 8. comorbid disease (as above) well controlled/stable in opinion of the investigator 9. normal (or stable if abnormal per comorbidity) baseline ecg 10. men of child-bearing potential must use birth control with heterosexual partner(s) (abstinence or condoms) 11. women of child-bearing potential must meet all the following criteria: - use of birth control (abstinence, oral contraceptives, condoms, or intrauterine device) - test negative for β-subunit of hcg