Hey acer2000, So far, aren't the percentages of healthy people testing pos (4-7%) somewhat similar to the percentage of HIV+ that don't eventually get AIDS (10% based on what you just said). And we haven't had enough time to see if those healthy people who tested XMRV+ pos may eventually get sick. HIV works by crippling the immune system. Gammaretroviruses may work by doing the same, just not as fast. Eventually we would need long-term studies to show the difference in percentages between HIV+ people getting AIDS and XMRV+ people getting ME/CFS) are statistically significant.