I think this is the D vs G strains? https://www.biospace.com/article/mutated-covid-19-viral-strain-in-us-and-europe-much-more-contagious/ https://www.biospace.

I think this is the D vs G strains? https://www.biospace.com/article/mutated-covid-19-viral-strain-in-us-and-europe-much-more-contagious/ https://www.biospace.com/article/mutated-covid-19-viral-stra...