We we have found less deadly strains (I link to one paper in the post that found one - still too deadly) and we have found strains with large (and small) deletions. What we haven’t done is go specifically looking for strains with exactly the properties we want (yet at least).
There is no need to create any viral mutants in the lab (and all the difficulties this will involve), just use what is already out there in the community. We just need to go and look for them.
There is no need to create any viral mutants in the lab (and all the difficulties this will involve), just use what is already out there in the community. We just need to go and look for them.