Quercetin, vitamin C, bromelain (QCB)
Supplementation containing 500mg of quercetin, 500mg of vitamin C and 50mg of bromelain (QCB) was initiated daily in 2 divided doses.
Control group
Control group without using supplements.
COVID-19 prophylaxis (excluding children)
Healthcare professionals (aged between 20-60 years) working in areas of high exposure and high risk of transmission of SARS-COV-2 (COVID areas, Intensive Care Unit (ICU), Emergency Department, Anesthesia Inpatient and Outpatient Clinics, Dialysis Units andhealthcare frontiers who perform all those aerosol-generating procedures), without history of COVID-19.
Open-label.
Single center, Kanuni Sultan Suleyman Training and Research Hospital, Istanbul, Turkey.
At the end of the follow-up period, COVID-19 rapid diagnostic tests (RDT) were used to detect COVID-19 IgG and M positivity in all cases.While computerized axial tomography (CAT) scan is being used for diagnosis of COVID-19, accurate diagnosis is established by reverse transcriptase chain reaction (RT- PCR).
