A study that supports the controversial link between chronic fatigue syndrome and a new type of virus has been blocked from being published in a leading scientific journal even though it had been accepted for publication by its editors. The study, by virologists working for the US Government’s Food and Drug Administration (FDA), is believed to support earlier findings published last October claiming that patients with the syndrome, also known as ME, are likely to be infected with a virus called XMRV, which some scientists believe may trigger the condition.