I like your idea a lot. It seems that a 12 nucleotide insertion mutation is responsible for a lot of the Covid-19 virulence. If such a large mutation is possi

I like your idea a lot. It seems that a 12 nucleotide insertion mutation is responsible for a lot of the Covid-19 virulence. If such a large mutation is possible, how would we prevent your loss of function asymptomatic strain from reverting its mutation in the wild? How big of a mutation are you envisioning? Is it impossible for it to be reverted in the wild or just unlikely? https://www.nature.com/articles/s41591-020-0820-9 https://www.nature.com/articles/s41591-020-0820-9