there’s this guy claiming that PCR tests for Covid19 are 90% false positive. this just isn’t remotely true
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Replying to @DanielleFong
30% false positive, but 20% false negative. The test has issues but the minor edge false positive has is negligible.
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Replying to @AblemanAdam
again, these numbers are massively overinflated... people may be conflating cases where the disease is in remission and needs more cycles to detect in pcr, but this does not mean it’s a false positive, it means that people have had the disease
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Replying to @DanielleFong
They calculate this by giving people multiple tests and seeing the avg error rate.
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Replying to @AblemanAdam
if you’re talking about rapid tests this might be possible but it would be bad; if you’re talking about pcr tests this is orders of magnitude worse that other numbers i’ve seen, i would appreciate a link
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Replying to @DanielleFong
Sure, they refer to it as calculating sensitivity vs specificity:https://thehill.com/changing-america/well-being/prevention-cures/496651-false-positive-and-false-negative-coronavirus …
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thank you! this is a great link. all of these higher false positive and false negative values are for non pcr tests, i noticed, but it’s still helpful that they named the values for particular other tests
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