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Vitamin C study #7 of 18
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, 9.6% lower, RR 0.90, p = 0.58, treatment 29 of 67 (43.3%), control 157 of 305 (51.5%), adjusted per study, odds ratio converted to relative risk, model 2 conditional logistic regression.
risk of COVID-19 case, 16.5% lower, RR 0.83, p = 0.04, treatment 29 of 67 (43.3%), control 157 of 305 (51.5%), adjusted per study, 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.
All 18 studies
Please send us corrections, updates, or comments. Vaccines and treatments are both extremely valuable and complementary. All practical, effective, and safe means should be used. Elimination of COVID-19 is a race against viral evolution. No treatment, vaccine, or intervention is 100% available and effective for all current and future variants. Denying the efficacy of any method increases the risk of COVID-19 becoming endemic; and increases mortality, morbidity, and collateral damage. We do not provide medical advice. Before taking any medication, consult a qualified physician who can provide personalized advice and details of risks and benefits based on your medical history and situation. Treatment protocols for physicians are available from the FLCCC.
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