In October 2009, a team led by Vincent C. Lombardi of the Whittemore Peterson Institutereported the presence of a recently discovered virus, XMRV, in 67% of the blood samples from 101 American patients with chronic fatigue syndrome (CFS). XMRV had previously been linked to some cases of prostatecancer.
This sparked intense interest amongst many people and much discussion. But in January this year, Erlwein et al reported that they did not find any evidence of XMRV in the blood of 186 British CFS patients (my post).
Now, a second British study has appeared, and the results are also negative. The paper is Groom et al's Absence of xenotropic murine leukaemia virus-related virus in UK patients with chronic fatigue syndrome. They found no XMRV in 170 British CFS patients or 395 healthy controls. VirologyBlog has an excellent summary of the latest paper.
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