* active covid19 disease: positive rt-pcr covid19 test * prior covid19 disease * weight less than 40kg or a bmi less than 18kg/m2 * current or recent hospitalization within the past year * known allergy to or intolerance of hydroxychloroquine (hcq) or chloroquine (cq) * current use of hcq or cq for whatever indications (malaria, lupus) * current use of other medication with known antiviral effects * current or known use in the last two weeks of known arrhythmogenic drugs or drugs that prolong the qt interval in the ecg, including but not limited to quinolones, macrolides, amiodarone, digoxin, flecainide, propafenone * any previous known or suspected retinopathy; in case of doubt, an ophthalmology clearance be secured prior to enrollment * known g6pd deficiency discovered through the newborn screening program or known intolerance or allergies to beans and any food that contains beans * women who are pregnant or breastfeeding, or a positive pregnancy test at baseline for women of child bearing age * history of known seizures or treatment with anti-epileptic medications * history of known existing arrhythmia * intake or use of anti diabetic agents especially sulfonylureas or any type of insulin * presence of abnormalities in baseline tests: 1. ecg abnormalities that are exclusionary: baseline qtc \> 500 msec or qtc \> 550 msec in patients with wide qrs; any form of tachy- or bradyarrythmias nb: sinus arrhythmia is not exclusionary 2. cbc abnormalities showing anemia with hemoglobin value less than 12.5 g/dl or low platelet count or thrombocytopenia with platelet count less than 150,000 platelets per microliter 3. creatinine levels above normal values: 60 to 110 micromoles per liter (0.7 to 1.2 mg/dl for men and 45 to 90 micromoles per liter (0.5 to 1.0 mg/dl) for women 4. alt test that is elevated above 2x the upper limit of the normal: nv is 7 to 56 units per liter

* active covid19 disease: positive rt-pcr covid19 test * prior covid19 disease * weight less than 40kg or a bmi less than 18kg/m2 * current or recent hospitalization within the past year * known allergy to or intolerance of hydroxychloroquine (hcq) or chloroquine (cq) * current use of hcq or cq for whatever indications (malaria, lupus) * current use of other medication with known antiviral effects * current or known use in the last two weeks of known arrhythmogenic drugs or drugs that prolong the qt interval in the ecg, including but not limited to quinolones, macrolides, amiodarone, digoxin, flecainide, propafenone * any previous known or suspected retinopathy; in case of doubt, an ophthalmology clearance be secured prior to enrollment * known g6pd deficiency discovered through the newborn screening program or known intolerance or allergies to beans and any food that contains beans * women who are pregnant or breastfeeding, or a positive pregnancy test at baseline for women of child bearing age * history of known seizures or treatment with anti-epileptic medications * history of known existing arrhythmia * intake or use of anti diabetic agents especially sulfonylureas or any type of insulin * presence of abnormalities in baseline tests: 1. ecg abnormalities that are exclusionary: baseline qtc \> 500 msec or qtc \> 550 msec in patients with wide qrs; any form of tachy- or bradyarrythmias nb: sinus arrhythmia is not exclusionary 2. cbc abnormalities showing anemia with hemoglobin value less than 12.5 g/dl or low platelet count or thrombocytopenia with platelet count less than 150,000 platelets per microliter 3. creatinine levels above normal values: 60 to 110 micromoles per liter (0.7 to 1.2 mg/dl for men and 45 to 90 micromoles per liter (0.5 to 1.0 mg/dl) for women 4. alt test that is elevated above 2x the upper limit of the normal: nv is 7 to 56 units per liter

active covid19 disease: positive rt-pcr covid19 test prior covid19 disease weight less than 40kg or a bmi less than 18kg/m2 current or recent hospitalization within the past year known allergy to or intolerance of hydroxychloroquine (hcq) or chloroquine (cq) current use of hcq or cq for whatever indications (malaria, lupus) current use of other medication with known antiviral effects current or known use in the last two weeks of known arrhythmogenic drugs or drugs that prolong the qt interval in the ecg, including but not limited to quinolones, macrolides, amiodarone, digoxin, flecainide, propafenone any previous known or suspected retinopathy; in case of doubt, an ophthalmology clearance be secured prior to enrollment known g6pd deficiency discovered through the newborn screening program or known intolerance or allergies to beans and any food that contains beans women who are pregnant or breastfeeding, or a positive pregnancy test at baseline for women of child bearing age history of known seizures or treatment with anti-epileptic medications history of known existing arrhythmia intake or use of anti diabetic agents especially sulfonylureas or any type of insulin presence of abnormalities in baseline tests: ecg abnormalities that are exclusionary: baseline qtc > 500 msec or qtc > 550 msec in patients with wide qrs; any form of tachy- or bradyarrythmias nb: sinus arrhythmia is not exclusionary cbc abnormalities showing anemia with hemoglobin value less than 12.5 g/dl or low platelet count or thrombocytopenia with platelet count less than 150,000 platelets per microliter creatinine levels above normal values: 60 to 110 micromoles per liter (0.7 to 1.2 mg/dl for men and 45 to 90 micromoles per liter (0.5 to 1.0 mg/dl) for women alt test that is elevated above 2x the upper limit of the normal: nv is 7 to 56 units per liter

active covid19 disease: positive rt-pcr covid19 test prior covid19 disease weight less than 40kg or a bmi less than 18kg/m2 current or recent hospitalization within the past year known allergy to or intolerance of hydroxychloroquine (hcq) or chloroquine (cq) current use of hcq or cq for whatever indications (malaria, lupus) current use of other medication with known antiviral effects current or known use in the last two weeks of known arrhythmogenic drugs or drugs that prolong the qt interval in the ecg, including but not limited to quinolones, macrolides, amiodarone, digoxin, flecainide, propafenone any previous known or suspected retinopathy; in case of doubt, an ophthalmology clearance be secured prior to enrollment known g6pd deficiency discovered through the newborn screening program or known intolerance or allergies to beans and any food that contains beans women who are pregnant or breastfeeding, or a positive pregnancy test at baseline for women of child bearing age history of known seizures or treatment with anti-epileptic medications history of known existing arrhythmia intake or use of anti diabetic agents especially sulfonylureas or any type of insulin presence of abnormalities in baseline tests: ecg abnormalities that are exclusionary: baseline qtc > 500 msec or qtc > 550 msec in patients with wide qrs; any form of tachy- or bradyarrythmias nb: sinus arrhythmia is not exclusionary cbc abnormalities showing anemia with hemoglobin value less than 12.5 g/dl or low platelet count or thrombocytopenia with platelet count less than 150,000 platelets per microliter creatinine levels above normal values: 60 to 110 micromoles per liter (0.7 to 1.2 mg/dl for men and 45 to 90 micromoles per liter (0.5 to 1.0 mg/dl) for women alt test that is elevated above 2x the upper limit of the normal: nv is 7 to 56 units per liter

- active covid19 disease: positive rt-pcr covid19 test - prior covid19 disease - weight less than 40kg or a bmi less than 18kg/m2 - current or recent hospitalization within the past year - known allergy to or intolerance of hydroxychloroquine (hcq) or chloroquine (cq) - current use of hcq or cq for whatever indications (malaria, lupus) - current use of other medication with known antiviral effects - current or known use in the last two weeks of known arrhythmogenic drugs or drugs that prolong the qt interval in the ecg, including but not limited to quinolones, macrolides, amiodarone, digoxin, flecainide, propafenone - any previous known or suspected retinopathy; in case of doubt, an ophthalmology clearance be secured prior to enrollment - known g6pd deficiency discovered through the newborn screening program or known intolerance or allergies to beans and any food that contains beans - women who are pregnant or breastfeeding, or a positive pregnancy test at baseline for women of child bearing age - history of known seizures or treatment with anti-epileptic medications - history of known existing arrhythmia - intake or use of anti diabetic agents especially sulfonylureas or any type of insulin - presence of abnormalities in baseline tests: 1. ecg abnormalities that are exclusionary: baseline qtc > 500 msec or qtc > 550 msec in patients with wide qrs; any form of tachy- or bradyarrythmias nb: sinus arrhythmia is not exclusionary 2. cbc abnormalities showing anemia with hemoglobin value less than 12.5 g/dl or low platelet count or thrombocytopenia with platelet count less than 150,000 platelets per microliter 3. creatinine levels above normal values: 60 to 110 micromoles per liter (0.7 to 1.2 mg/dl for men and 45 to 90 micromoles per liter (0.5 to 1.0 mg/dl) for women 4. alt test that is elevated above 2x the upper limit of the normal: nv is 7 to 56 units per liter

- active covid19 disease: positive rt-pcr covid19 test - prior covid19 disease - weight less than 40kg or a bmi less than 18kg/m2 - current or recent hospitalization within the past year - known allergy to or intolerance of hydroxychloroquine (hcq) or chloroquine (cq) - current use of hcq or cq for whatever indications (malaria, lupus) - current use of other medication with known antiviral effects - current or known use in the last two weeks of known arrhythmogenic drugs or drugs that prolong the qt interval in the ecg, including but not limited to quinolones, macrolides, amiodarone, digoxin, flecainide, propafenone - any previous known or suspected retinopathy; in case of doubt, an ophthalmology clearance be secured prior to enrollment - known g6pd deficiency discovered through the newborn screening program or known intolerance or allergies to beans and any food that contains beans - women who are pregnant or breastfeeding, or a positive pregnancy test at baseline for women of child bearing age - history of known seizures or treatment with anti-epileptic medications - history of known existing arrhythmia - intake or use of anti diabetic agents especially sulfonylureas or any type of insulin - presence of abnormalities in baseline tests: 1. ecg abnormalities that are exclusionary: baseline qtc > 500 msec or qtc > 550 msec in patients with wide qrs; any form of tachy- or bradyarrythmias nb: sinus arrhythmia is not exclusionary 2. cbc abnormalities showing anemia with hemoglobin value less than 12.5 g/dl or low platelet count or thrombocytopenia with platelet count less than 150,000 platelets per microliter 3. creatinine levels above normal values: 60 to 110 micromoles per liter (0.7 to 1.2 mg/dl for men and 45 to 90 micromoles per liter (0.5 to 1.0 mg/dl) for women 4. alt test that is elevated above 2x the upper limit of the normal: nv is 7 to 56 units per liter