Have you read that 90% of COVID-19 tests are false positives? Turns out, that's total nonsense. False positives are very rare, most positives are just that: positivehttps://medium.com/@gidmk/most-positive-coronavirus-tests-are-true-positives-60c95fe54fec …
Well, I have an epidemiology degree and that's remarkable nonsense. The prevalence in the ONS survey was from a random sample, not those tested in pillar II. It's also IMPOSSIBLE for the specificity of the testing to be <99.92%, as per the ONS figures
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It's very simple - they ran 219,000 tests and got 159 positives back. If every single one of those was a false positive - I.e. sensitivity was 0% - then the specificity would be 99.92%, making this opinion mathematically incorrect
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If this doctor is saying that the specificity of "community grade" tests is 95%, they are presumably referring to a different kind of test than the ones used by the ONS, which was of course the same national testing scheme as pillar I/II
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