Some ART therapy is known to help with Herpes infection, unless you are measuring viral levels and carefully tracking immune function during treatment there is no way to know what exactly is being helped by the antiretrovirals. We do know that antivirals in general often help CFS patients, as do some anticancer drugs, and sometimes antibiotics, so there could be many possible explanations. Not certain what that comment about putting antibodies means, do you mean giving ART causes XMRV antibodies to increase? That would be hard to explain any other way than die-off from an active infection, I agree. But which infection? Those antibodies are often very cross-reactive, including with HERVs as well as multiple MuLV type retroviruses and maybe others. Until that situation is reviewed by experts, who knows.