I've followed the topic quite a while and there seem to be many trustworthy proponents for the use of Ivermectin at any stage of the disease. On the contrary people against it seem to be only pointing to the fact that there isn't enough quality research in favor for its use (which doesn't seem to be the case), or to this study https://jamanetwork.com/journals/jama/fullarticle/2777389 , which is raising many red flags to plenty of researchers as being a badly designed study.