[Muuuchem]

Just read it and they were not disputing the existence of two strains but rather that the virus didnt jump from animals twice. The article disputes the claim that because L strain is 70% of the cases, that it must be more virulent.

[bmsran]

the distinction is important here because this subthread started from the suggestion that there are multiple strains circulating, with different virulence. The fact there are multiple lineages is a natural consequence of how viruses spread