The Guardian asked Douglas, now 68, whether he regretted his years of smoking and drinking for causing his throat cancer. Douglas gave a "surprisingly frank" answer to the British paper: "No. Because without wanting to get too specific, this particular cancer is caused by HPV [human papillomavirus]..."Notice the underlying assumption and shaming behavior of the questioner. This my friends, is the battle. Speak the truth.
(I think this works the other way too. I'm pretty sure prostate and breast cancer are caused by oral microbes.)