Remember samples are blinded and from someone who tested positively and this is newly drawn, never before stored blood at the WPI
They wrongly identified a negative control as positive - but think they can explain the area.
They were able to identify XMRV correctly in 3 of 4 positives - it wasn't easy, they could only do so on one day and they missed on one but the important thing is that by and large they identified the positive samples correctly - a big win
This suggests a) because the controls tested negative, their lab is not contaminating the samples
b) while its not always easy to find XMRV they can find it and in the right samples....
Their ability to identify the positives and controls correctly suggests
they are doing something right and the other labs are doing something wrong..
Its a good result.
It's a little sketchy because they missed on one control and XMRV is not easy to find - and, suggests that really, no one has a really good test for it yet.
It also kind of suggests that there were only five samples??? (Is that how they blind - throw ONE more sample in there?). That doesn't sound like a strong test...)
The salient fact is though, that, by and large the WPI picked out the controls from the positives and that is the acid test. It suggests to me that the WPI is doing some right the other labs are not and that the BWG should be very carefully going over the labs procedures - down to the smallest detail - to see what the WPI is doing differently.
To me this seems like a big win for the WPI