Firstly, Ivermectin has been used against viruses for about 10 years, not just against parasites.
Secondly, don't get me started on the military industrial complex.
Thirdly, most of the loudest voices for Ivermectin are not ant-vaxxers, they may well be anti-covid-vaccine but slurring them with the term anti-vaxxer is not helping... would you call that Dr. Campbell an anti-vaxxer since he supports Ivermectin ?
But it's not had a large scale reputable trial for Covid (unlike all of the approved vaccines the UK/ EMA is using)? Ivermectin talk is different does, different virus, different timeframes, so previous "knowledge" on side effects could be limited.
Most of the Ivermectin noise seems to come from what I would call conspiracy theory, against the norm or against the largest and most respect health organisations and authorities in the world.
John's channel is good, he's a good talker, and has some interesting guests, but he's certainly not an authority on this, and he himself could get misled.
He's also got a lot wrong (largely from being misled), like assuming lower IFR's, he trusted Yeadon and numerical analysis is not one of his strong points.
He's also not a medical doctor, he's a doctor of philosophy, but is talking about specialist medical/ immunology/ epidemiology using a Dr title, which can mislead some who have not watched a lot of his vids. He was a nurse teacher, and now fills in as a nurse I think. That's not to say he doesn't know what he's on about, as he does, but don't treat it as gospel, it's youtube/ the internet.
He also doesn't seem to "support" Ivermectin, he's got an open mind on it based on a meta-analysis from someone who is largely unknown, who has a deferring opinion to that of the EMA, WHO among many others.
John's channel does seem to attract a lot of people looking for "alternatives" to the logic, largely on the videos that contain the latest controversial titles/ subjects.
I've got an open mind on it (Ivermectin), but if the WHO, EMA and others won't approve it until it's had a large scale reputable trial (like vaccines), then it is what it is. It may have been more likely to have more interest/ larger trials last year when we were expecting vaccines to not come till 22/23, but the vaccines have largely solved the problem (about 20 of them), quite cheaply, they just need to be made, and the cases/ model needs to be managed.