Positive SARS-CoV-2 Test group (Target enrollment: N=1,800) NUTROVID Treat Trial: Adult men/women recently diagnosed with COVID-19 (positive PCR test for SARS-CoV-2 coronavirus) within <=5 days of symptom onset; and satisfying one of these risk factors: >=50 years old; or Diabetic & >=40 years old; or Obese & >=40 years old.  Negative SARS-CoV-2 Test group (Target enrollment: N=1,800) NUTROVID Prevent Trial: Adult men/women recently tested negative for COVID-19 (negative PCR test for SARS-CoV-2 coronavirus); and satisfying one of these risk factors: >=50 years old; or Diabetic & >=40 years old; or Obese & >=40 years old.  Signed Informed Consent Form  Exclusion Criteria:  Patients requiring immediate intubation or deemed likely to die within 48 hours. Patients deemed likely for transfer to an ICU within 48 hours. Patients currently taking oral corticosteroids for any reason at the time of presentation for care. Patients included in any other interventional trial. Uncontrolled bacterial superinfection. Severe chronic kidney disease (stage 4) or requiring dialysis (i.e. eGFR < 30). Pregnant women or women who are breastfeeding. Immunocompromised patients. Any patient with recent treatment (past 30 days) of immunosuppressive agents including (but not restricted to) DMARDs, corticosteroids, antibody therapy, intravenous immunoglobulins etc. Patients with acute myocardial infarction.