A few caveats. The first is Prof. Inoue of the Japanese National Institute of Genetics is the source. The original paper is in Japanese. I don't have the time to give it the half hour - hour it takes to find the summaries (some of them are bad, some of them particularly in the scie journals) are better, but I am very busy which is partially the reason I don't just post it (as I've written before this takes up maybe 10% of my attention while I'm multitasking). I don't book mark things (posting stuff here is I'm kind of like a little kid collecting interesting colored stones in a basket). But I'll send you the video previously posted by PM (don't want to brook espola's laziness and the summary is around minute 10.....Campbell is discussing a bunch of theories for why Japan is acting the way it does and starts with Ivermectin and goes into the defense enzyme which the Japanese may have a higher proportion of....you can do research from there). Again, don't know if it's true or not. Don't really care. I just found it an interesting colored stone.
At last, some intellectual content! That Campbell video, which you haven't mentioned in your previous defense of your coocoo biology, was posted Nov. 23, not last week. Also, nowhere in that video does Campbell discuss running out of mutations, so that is at least one mis-statement you made, adding to your medal count in that category.
I take issue with Campbell's implication that all or almost all of the virus particles inhabiting Japanese victims stumbled into the same self-limiting mutations, ignoring the random nature of genetic mutations that are at the core of molecular genetic evolution. I find more interesting his comments on the APOBEC3A in Asian populations (except perhaps Koreans).
Unless you had some different Campbell video in mind than this one --
which is titled "Ivermectin in Japan".