So let's remember how evolution works, shall we? Evolution selects for strains that reproduce the most and selects against ones with attenuated reproduction rat

So let's remember how evolution works, shall we? Evolution selects for strains that reproduce the most and selects against ones with attenuated reproduction rates. That's the whole basis of biology. If you've observed a wild strain sequenced in a database, that should be considered direct evidence that it reproduces well enough to have been sampled as a representative isolate. > as far as I know nobody is trying Of course we are. We are deeply engaged in studying the key residues that mediate all aspects of viral infection, reproduction, and clinical pathology. That's another way of saying that an incredible number of researchers have dropped everything to study the genetic and molecular determinants of pathogenicity. Don't worry -- we are on it.