Me? I'm with Daisy on the "ignorance is bliss" side. Growing outdoors in uncontrolled conditions, there's nothing much I can do to prevent the spread of virus except what I'm already doing which is to control insects as best I can and keep my tools clean.
In fact, it's kind of nice to have something to blame when a plant just up and dies for "no reason". Now I can say well, it was probably some evil virus.
