Hmmm, sounds a bit sketchy to be honest, I'm no biologist but I'd imagine that'd extremly difficult to acheive as well as the fact that if it where to occur then a new virus releasedwould be extremely unpredictible potentially creating a very large epidemic quickly and very possibly mutating to attack many others.

Forgive my skepticisic mate, have you got the article to hand, be nice to have a read. Oh and if turns out to be true I shall gladly eat my words.