Does he call them L and S. That might not even be the right letters but that is what is sticking in my head.
Pretty sure I saw it on the same site that had published the neuroinvasive study/questions..etc.
this is not where I found it..but here is more info.
L and S
I don’t remember the letters.
It looks like the second strain mutated in Italy. It was not as lethal as the first strain but spread more easily (higher latency with no symptoms).
He also presented evidence that the second strain could be undetected for as long as six weeks.
S-COV
30 % of cases. Less aggressive. Less complications. Sourced to ancestral bats.
L-COV
70 % of cases. More aggressive. More complications. Dominant in early Wuhan. Can collapse though due to high virulence. First showed up on 1/20/20.
Source is Peak Prosperity. His source was a scientific study I did not write down.
About the L and S strains
https://www.freerepublic.com/focus/chat/3821921/posts?page=486#486
https://academic.oup.com/nsr/advance-article/doi/10.1093/nsr/nwaa036/5775463
H/t HollyB