Biotech Values

[rfj1862]

No, I was addressing two different points. Sorry if I wasn't clear. In any case it doesn't matter if resistance arises as a result of selection of pre-existing virus or mutation. In the first case (selection) development of resistance should be relatively rapid. In the second case (mutation) there's no reason to suspect that a mutation in CCR5 would be less likely to occur than a mutation in RT.