Ivan, Did you hear on the news this morning about the so-called error that was made in giving polio vaccines to hundreds of thousands of children - that a virus was mistakenly included in the vaccine that is now being held responsible for a kind of lung cancer, and various other diseases that are striking our contemporaries now! In view of your virus theory, I think that is a very significant piece of news! Hilary (P.S. Burt died of lung cancer)