Created at	Source	Raw Value	Validated value
June 25, 2024, noon	usa	inclusion criteria: * health-care worker with frequent contact with confirmed covid-19 patients * no active or past infection with sars-cov-2 * 18 years of age or older * no allergy or contraindication to hydroxychloroquine * written informed consent	inclusion criteria: * health-care worker with frequent contact with confirmed covid-19 patients * no active or past infection with sars-cov-2 * 18 years of age or older * no allergy or contraindication to hydroxychloroquine * written informed consent
Oct. 26, 2020, 11:31 p.m.	usa	inclusion criteria: - health-care worker with frequent contact with confirmed covid-19 patients - no active or past infection with sars-cov-2 - 18 years of age or older - no allergy or contraindication to hydroxychloroquine - written informed consent	inclusion criteria: - health-care worker with frequent contact with confirmed covid-19 patients - no active or past infection with sars-cov-2 - 18 years of age or older - no allergy or contraindication to hydroxychloroquine - written informed consent