This is important because it is only fair to emphasise again that nobody knew about these risks before Lombardi et al, in that the levels of contamination of lab products with XMRV and related MLVs are now extremely widespread. That's significant because again it shows that Dr Mikovits could not have been expected to expect this to be the case - it is a shock to everyone. It's an even more significant point, IMO, because the completely unexpected and unknown spread, which has been going on for 15 years or more, ofthis particular lab-created retrovirus that infects human cells, is a big surprise finding, and it is surely an important one - and should be bigger news. How much more of this has been going on? And has any such agent, ever in history, infected anything which has been distributed for human use (such as specific cell lines used to grow vaccines)? The scale of this problem and the length of time it has been occurring, by the law of averages suggests: Almost certainly, yes. No pathogenic example has yet been identified, but that is not to say that one does not exist. Sporadic cases of H1N1-induced novel forms of narcolepsy, anyone?
Two points I've recently highlighted elsewhere on these forums are re-iterated again here.
It is still unknown whether unkown retroviruses are inciting factors in ME/CFS. Obviously, but seems to need stating.
Most of the studies of ME/CFS samples have not used primers that would detect all groups of MLVs. So MLVs, other than XMRV specifically, have not been much searched for.
And as a final comment: after all this time, after all the analysis in this study, all the experiments performed, it still was not possible to nail the question of whether the sequences they sporadically detected really did come from the patients' blood, or not. That just illustrates how cutting-edge and difficult the science of this is, and shows that there is still a great deal of work to be done before all the mysteries around these viruses will be fully explained.