Has any one investigated whether the variants of MLV/XMRV found by WPI and Alter are the same or similar to the MLV that causes MAIDS -- murine acquired immune deficiency syndrome? In reading about MAIDS, many of the problems caused by MAIDS in mice sound similar to the Canadian Clinical Consensus description of CFS. Complications such as viral infections of the heart and heart failure in the mice parallel similar problems in a subset of people with CFS. In fact, some doctors have gone so far as to assert their belief that CFS /is/ heart failure. The various problems with enlarged lymph glands, vulnerability to opportunistic viruses, immune deficiencies, cancers, etc, in MAIDS are similar enough to CFS to make me wonder if it is a viable model for the kind of disease we might expect to see in people infected with the murine viruses. Does anyone know anything about this that might help clarify whether this is an area of concern, or if not, why not?