QuadraMune(TM) for Prevention of COVID-19

Inclusion Criteria: * Informed consent, provided electronically via the EDC, demonstrating the subject understands the procedures required for the study and the purpose of the study Male or female patients 18 years of age or older that are considered to be high-risk individuals. * High-risk individuals are defined as all health care workers in hospitals, clinics, and emergency rooms, and medical facilities. * Subjects must agree to practice at least two highly effective methods of birth control for the duration of the study This includes condoms with spermicide, oral birth control pills, contraceptive implants, intra-uterine devices, or diaphragms. At least one of these must be a barrier method. Subjects not of reproductive potential will be exempt (e.g. post-menopausal, surgically sterilized) Exclusion Criteria: * Refusal to provide informed consent Any previous positive test for COVID-19 by RT-PCR Symptomatic for COVID-19 Diarrhea prior to the start of treatment Type I or II diabetes Atherosclerotic Coronary Artery Disease Any contraindication for treatment with hydroxychloroquine including: Hypoglycemia G6PD deficiency Porphyria Anemia Neutropenia Alcoholism Myasthenia Gravis Skeletal muscle disorder Maculopathy Changes in the visual field Liver disease, with ALT/AST \> 2.5 upper limit normal and total bilirubin \>2.5 upper limit normal Psoriasis Any comorbidities which, in the opinion of the investigator, constitute health risk for the subject.