This study is a followup of Kerr et al (2022) published in Cureus.
As pointed out in a detailed description by Steve Kirsch of the Vaccine Safety Research Foundation, regular users of prophylactic Ivermectin at a (very low) dose of 0.2 mg/kg/day for two consecutive days every 15 days got sick, hospitalized, or died far less than those who used Ivermectin irregularly, or not at all. Even those who used it irregularly did better than those who didn’t use it at all.
CONCLUSION: “Non-use of ivermectin was associated with a 12.5-fold increase in mortality rate and seven-fold increased risk of dying from COVID-19 compared to the regular use of ivermectin in a PSM comparison of a strictly controlled population. This dose-response efficacy reinforces the prophylactic effects of ivermectin against COVID-19.”
What does the World Health Organization say?
They are ignoring it! They continue to claim that “Ivermectin is to be avoided, except in a clinical trial.” They have not updated their treatment guideline for Ivermectin since March, 2021 (over 1 year now).
Most studies on using Ivermectin for COVID have been ignored with the excuse they are relatively small. After all, there is no money in a study of this safe old off-patent medication. This study, however, included the entire population of a small city (223,128 residents of Itajaí).
Nevertheless, neither the CDC nor the WHO appear interested.
NOTE: (MY conclusion) The CDC & WHO are wrong to deny you the use of Ivermectin, telling you that “you are not a horse,” as though that matters. Human-grade penicillin is used for fish, too, but nobody is telling you not to take this antibiotic when you need it because “you are not a fish.” Obviously, you would need an appropriate dose for any medication, and not a dose set for a horse (or a fish).