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Ivermectin study #43 of 63
12/20 Prophylaxis study
Vallejos et al., Trials, doi:10.1186/s13063-020-04813-1 (Preprint)
Ivermectin to prevent hospitalizations in patients with COVID-19 (IVERCOR-COVID19): a structured summary of a study protocol for a randomized controlled trial
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Report on ivermectin + carrageenan prophylaxis in a hospital in Argentina showing lower cases for healthcare workers taking ivermectin. The effect is likely to be primarily due to ivermectin - the creator of the protocol has later reported that carrageenan is not necessary [1]. Preliminary results from: [2].

Vallejos et al., 12/20/2020, retrospective, Argentina, South America, preprint, 1 author, dosage 12mg weekly.
risk of COVID-19 case, 73.6% lower, RR 0.26, p < 0.001, treatment 11 of 389 (2.8%), control 52 of 486 (10.7%).

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.
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