One problem is that such studies tend to focus on people who have already been hospitalized due to COVID19. Well, Ivermectin is most effective when used early after onset of COVID19. It's also somewhat effective after substantial breathing difficulty sets in, but it's far more effective at preventing the lung damage to start with by early dosing with it, soon after diagnosis. Used early, doctors who are working with it are of the opinion that it operates as a near perfect cure. Wait till the damage is already done to the lungs, however, and it's helpfulness, though still present, is significantly reduced. Unfortunately, the above study seems focused on its helpfulness after lung damage has already occurred, and has already caused significant breathing issues.
