subjects who have any of the following criteria at baseline will be excluded from participating in this study: * symptoms of acute respiratory illness (e.g. fever, runny nose, sore throat, cough, breathlessness, loss of smell and loss of taste) for the past 30 days * known current or history of sars-cov-2 infection * unable to read english or any of the available local languages used for this clinical trial * history of cardiac or neurological diseases * history of retinal diseases * history of diabetes on insulin treatment * history of depression * history of chronic alcohol use * history of renal or hepatic dysfunction * history of glucose-6-phosphate dehydrogenase deficiency * history of anaemia, after exposure to any given medications * history of thyroid disorder, hyperthyroidism, or sensitivity to iodine * history of allergies with systemic presentation to any given medication (e.g.: swelling of the face, throat, eyes and lips, respiratory disturbances, asthmatic attacks, widespread skin blistering or urticaria (hives)) * concomitant medication that may lead to cardiac arrhythmia (azithromycin, amitriptyline, cimetidine, citalopram, nortriptyline, pantoprazole, quetiapine etc). * unwilling to comply with study dosing, instructions or restrictions.

subjects who have any of the following criteria at baseline will be excluded from participating in this study: * symptoms of acute respiratory illness (e.g. fever, runny nose, sore throat, cough, breathlessness, loss of smell and loss of taste) for the past 30 days * known current or history of sars-cov-2 infection * unable to read english or any of the available local languages used for this clinical trial * history of cardiac or neurological diseases * history of retinal diseases * history of diabetes on insulin treatment * history of depression * history of chronic alcohol use * history of renal or hepatic dysfunction * history of glucose-6-phosphate dehydrogenase deficiency * history of anaemia, after exposure to any given medications * history of thyroid disorder, hyperthyroidism, or sensitivity to iodine * history of allergies with systemic presentation to any given medication (e.g.: swelling of the face, throat, eyes and lips, respiratory disturbances, asthmatic attacks, widespread skin blistering or urticaria (hives)) * concomitant medication that may lead to cardiac arrhythmia (azithromycin, amitriptyline, cimetidine, citalopram, nortriptyline, pantoprazole, quetiapine etc). * unwilling to comply with study dosing, instructions or restrictions.

subjects who have any of the following criteria at baseline will be excluded from participating in this study: - symptoms of acute respiratory illness (e.g. fever, runny nose, sore throat, cough, breathlessness, loss of smell and loss of taste) for the past 30 days - known current or history of sars-cov-2 infection - unable to read english or any of the available local languages used for this clinical trial - history of cardiac or neurological diseases - history of retinal diseases - history of diabetes on insulin treatment - history of depression - history of chronic alcohol use - history of renal or hepatic dysfunction - history of glucose-6-phosphate dehydrogenase deficiency - history of anaemia, after exposure to any given medications - history of thyroid disorder, hyperthyroidism, or sensitivity to iodine - history of allergies with systemic presentation to any given medication (e.g.: swelling of the face, throat, eyes and lips, respiratory disturbances, asthmatic attacks, widespread skin blistering or urticaria (hives)) - concomitant medication that may lead to cardiac arrhythmia (azithromycin, amitriptyline, cimetidine, citalopram, nortriptyline, pantoprazole, quetiapine etc). - unwilling to comply with study dosing, instructions or restrictions.

subjects who have any of the following criteria at baseline will be excluded from participating in this study: - symptoms of acute respiratory illness (e.g. fever, runny nose, sore throat, cough, breathlessness, loss of smell and loss of taste) for the past 30 days - known current or history of sars-cov-2 infection - unable to read english or any of the available local languages used for this clinical trial - history of cardiac or neurological diseases - history of retinal diseases - history of diabetes on insulin treatment - history of depression - history of chronic alcohol use - history of renal or hepatic dysfunction - history of glucose-6-phosphate dehydrogenase deficiency - history of anaemia, after exposure to any given medications - history of thyroid disorder, hyperthyroidism, or sensitivity to iodine - history of allergies with systemic presentation to any given medication (e.g.: swelling of the face, throat, eyes and lips, respiratory disturbances, asthmatic attacks, widespread skin blistering or urticaria (hives)) - concomitant medication that may lead to cardiac arrhythmia (azithromycin, amitriptyline, cimetidine, citalopram, nortriptyline, pantoprazole, quetiapine etc). - unwilling to comply with study dosing, instructions or restrictions.