The Report I read (not the one quoted) seemed mainly concerned with HPV Virus, with an additional reference to Herpes.
As far as I know none of the W.G.s I have met, although most of them smoked, actually had lung cancer, so I can`t blame mine on them but on the 600,000 or so fags I smoked until I gave it up 12 years ago (although I definitely hadn`t got it then).
On the other hand, I have used a large number of W.G.s (a couple even with BB) but never caught anything.
So, while I`m quite sure that the article may have some validity I have decided that it`s either too late for, or pointless for, any future concern on my part.