1. age \< 18 years 2. history of ventricular arrhythmia or use of class ia, ic and iii anti-arrhythmics 3. known prolonged qtc interval 4. history of retinal disease 5. kidney failure with gfr \<10% 6. chronic hepatic disease w/ child-pugh class b or c 7. hypersensitivity to chloroquine or hydroxychloroquine 8. currently taking chloroquine or hydroxychloroquine 9. unwilling to participate 10. unable to understand and/or sign the informed consent form.

1. age \< 18 years 2. history of ventricular arrhythmia or use of class ia, ic and iii anti-arrhythmics 3. known prolonged qtc interval 4. history of retinal disease 5. kidney failure with gfr \<10% 6. chronic hepatic disease w/ child-pugh class b or c 7. hypersensitivity to chloroquine or hydroxychloroquine 8. currently taking chloroquine or hydroxychloroquine 9. unwilling to participate 10. unable to understand and/or sign the informed consent form.

age < 18 years history of ventricular arrhythmia or use of class ia, ic and iii anti-arrhythmics known prolonged qtc interval history of retinal disease kidney failure with gfr <10% chronic hepatic disease w/ child-pugh class b or c hypersensitivity to chloroquine or hydroxychloroquine currently taking chloroquine or hydroxychloroquine unwilling to participate unable to understand and/or sign the informed consent form.

age < 18 years history of ventricular arrhythmia or use of class ia, ic and iii anti-arrhythmics known prolonged qtc interval history of retinal disease kidney failure with gfr <10% chronic hepatic disease w/ child-pugh class b or c hypersensitivity to chloroquine or hydroxychloroquine currently taking chloroquine or hydroxychloroquine unwilling to participate unable to understand and/or sign the informed consent form.

1. age < 18 years 2. history of ventricular arrhythmia or use of class ia, ic and iii anti-arrhythmics 3. known prolonged qtc interval 4. history of retinal disease 5. kidney failure with gfr <10% 6. chronic hepatic disease w/ child-pugh class b or c 7. hypersensitivity to chloroquine or hydroxychloroquine 8. currently taking chloroquine or hydroxychloroquine 9. unwilling to participate 10. unable to understand and/or sign the informed consent form.

1. age < 18 years 2. history of ventricular arrhythmia or use of class ia, ic and iii anti-arrhythmics 3. known prolonged qtc interval 4. history of retinal disease 5. kidney failure with gfr <10% 6. chronic hepatic disease w/ child-pugh class b or c 7. hypersensitivity to chloroquine or hydroxychloroquine 8. currently taking chloroquine or hydroxychloroquine 9. unwilling to participate 10. unable to understand and/or sign the informed consent form.