COVID-19 studies:  C19 studies: C19:  IvermectinIVM Vitamin DV.D HC QHC Q Vitamin CV.C ZincZn PVP-IPVP-I FLVFLV REGNR2 LY-CoVLY RemdesivirRMD
HCQ study #173 of 257
11/3 Pre-Exposure Prophylaxis study (treated before exposed to the virus)
Behera et al., PLOS ONE, doi:10.1371/journal.pone.0247163 (preprint 11/3) (Peer Reviewed)
Role of ivermectin in the prevention of SARS-CoV-2 infection among healthcare workers in India: A matched case-control study
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Retrospective matched case-control prophylaxis study for HCQ, ivermectin, and vitamin C with 372 healthcare workers, showing lower COVID-19 incidence for all treatments, with statistical significance reached for ivermectin.
HCQ OR 0.56, p = 0.29
Ivermectin OR 0.27, p < 0.001
Vitamin C OR 0.82, p = 0.58

Behera et al., 11/3/2020, retrospective, India, South Asia, peer-reviewed, 13 authors.
risk of COVID-19 case, 27.9% lower, RR 0.72, p = 0.29, treatment 7 of 19 (36.8%), control 179 of 353 (50.7%), adjusted per study, odds ratio converted to relative risk, model 2 conditional logistic regression.
risk of COVID-19 case, 26.3% lower, RR 0.74, p = 0.25, treatment 7 of 19 (36.8%), control 179 of 353 (50.7%), odds ratio converted to relative risk, matched pair analysis.

Effect extraction follows pre-specified rules prioritizing more serious outcomes. For an individual study the most serious outcome may have a smaller number of events and lower statistical signficance, however this provides the strongest evidence for the most serious outcomes when combining the results of many trials.
Details of all 257 studies    Meta analysis
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