Wow, this is shrapnel! First and foremost, twin scaling of a virused bulb will produce virused bulbils. Meristem culture is a quite different thing and will clean virused stock, but involves lab conditions. Two bulbs that were cleaned this wy: Narcissus 'Tete a Tete' and Hippeastrum papilio. You people must have heard years ago of a method (reported as very successful) for treatment of HIV patients: basically it consisted in heating their blood in a machine (to describe it crudely) letting it cool down and recircling it into the body. The heat killed the virus giving good life quality. Mysteriously, no report of it (for good or bad) for many years now.