https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7659803/?fbclid=IwAR3MeJdUDKRXHlWi3FujPnsfDisTvOLwyN0LagL71T5Xywtv79jUXKQqd7Q"Hydroxychloroquine for prophylaxis and treatment of COVID-19 in health-care workers"
"We offered prophylaxis with HCQ 200 mg daily for 14 days to 204 of them. In all, 76.4% of the group (156 HCW) used HCQ and none of them presented with COVID-19 symptoms. Of the 48 HCW that refused HCQ prophylaxis, three developed symptoms and tested positive for COVID-19.
During the last 7 months, 38 HCW at BCI have tested positive for COVID-19, half of them were symptomatic. We suggest the following treatment regimen as an early home-based therapy for them:
azithromycin 500 mg daily; HCQ 200 mg three times a day and zinc up to 50 mg daily for 14 days. Thirty-three (86.8%) of them undertook this treatment, their symptoms disappeared between days 2 and 4, none of them required hospitalization and all had a negative PCR test on day 14.
The other five HCW (13.2%) used alternative treatment regimens, none of them including HCQ. Three of them still tested positive at day 14 and two of them required hospitalization."