https://quillette.com/2021/07/06/looking-for-covid-19-miracl...
https://www.wweek.com/news/2021/09/15/a-progressive-biologis...
> “I am unvaccinated, but I am on prophylactic ivermectin,” Weinstein said on his podcast in June. “And the data—shocking as this will be to some people—suggest that prophylactic ivermectin is something like 100% effective at preventing people from contracting COVID when taken properly.”
He wasn't just claiming that ivermectin might have some efficacy against SARS-CoV-2 (possible, though I doubt it), or that the risks of the vaccine were understated to the public (basically true; but it's a great tradeoff for adults, and probably still the right bet for children). Bret was clearly implying that for many people--including himself, and he's not young--the risk/benefit for prophylactic ivermectin was more favorable than for the vaccine. There was no reasonable basis for such a belief, and the harm to those who declined vaccination based on such beliefs has become obvious in the relative death rates.
The first article I've linked above is by Yuri Deigin, who had appeared earlier on Bret's show to discuss the possibility that SARS-CoV-2 arose unnaturally, from an accident in virological research. This was back when that was a conspiracy theory that could get you banned from Facebook, long before mainstream scientists and reporters discussed that as a reasonable (but unproven) hypothesis like now. So I don't think Bret's services as a contrarian are entirely bad, but they're pretty far from entirely good.
For an expert's take on Eric's claims specifically, see https://www.cantorsparadise.com/eric-weinstein-how-not-to-fo...
And the ones that are masquerading as having Nobel worthy research chops to get the audience to believe their gripes about the scientific establishment is on topic enough.