this evidence is so compelling and it has been there for at least two decades and people still refuse to believe XMRV exists or that causes problems, weird how they mention some people have aids like illness and aids like MRIs but yet they keep testing negative for HIV,mmmhhh gee it's a no brainer it does not take a genius to know there's something else out there, and by the way "clusters" means it's infectious and transmissible ......http://vimeo.com/13048135