Not quite a vaccine but has been touted as a fantastic therapeutic following a large study, and has been installed into government testing programmes (thereby soaking up resources from other studies) as a front runner. It has a lot of "supporters" as the next best thing to a vaccine.
However the Guardian reports that the study is seriously flawed. www.theguardian.com/science/2021/jul/16/huge-study-supporting-ivermectin-as-covid-treatment-withdrawn-over-ethical-concerns
Also a study by the Pasteur Institute using it in hamsters has shown it has some anti inflammatory proporids but no anti-viral - i.e. it helps with symptoms but that's about it.
There seems to be a vast amount of resource being misdirected on various potentially useful products - particularly re-purposed ones - which seem to come to nothing. Something like 15k people were put on aspirin ffs, turned out to be no use at all. Whereas clinical trials for novel products from some of the more promising but lesser known companies struggle to find a few hundred. I guess that's unavoidable.
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