I think the paper is available here: https://www.imperial.ac.uk/media/imperial-college/institute-of-global-health-innovation/imperial_react1_r7_interim.pdf http

I think the paper is available here: https://www.imperial.ac.uk/media/imperial-college/institute-of-global-health-innovation/imperial_react1_r7_interim.pdf https://www.imperial.ac.uk/media/imperial-college/institute-... One really weird thing I noticed is when they talk about the limitations they mention issues around sensitivity but there is nothing in the paper that talks about specificity issues. The combination of non-zero false positive rate, lowish real rate in the population ~1% according to the test and testing people without symptoms surely creates a problem with the results. I guess for looking at differences over time this might not be a problem because the specificity/sensitivity issues should be a constant.