I've been using condoms since the Lombardi XMRV study in Science. Now that the Lipkin study has finally driven that hypothesis deep into its grave, I'm ready to ditch them. I have a long term, healthy spouse. The epidemology is just not there, as far as I can tell, for ME/CFS and sexual transmission. There is zilch in the literature (big surprise.) Anecdotal evidence of sexual transmission varies wildly, with patients on forums claiming it happens, and doctors claiming it doesn't. (Dr. Bell, who was the physician in Lyndonville during the '80s era epidemic has said that he's seen couples get sick at the same time from ostensibly a common pathogen, but never one after the other, ie transmission. Klimas says it's very unusual for partners to both be sick). Before Lombardi I never thought of ME/CFS as infectious; it never would have occurred to me. Any sick people with long term spouses out there?