If 1 in 1,000 people have a disease, and your test has a false positive rate of just 5%, you'll correctly identify someone with the disease only once every 50 positive tests (~2% of the time)https://twitter.com/WhySharksMatter/status/1258049909346967554 …
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Interesting! And what would be the numbers if you take that 51 positives and make a second test to them?
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If 1 out of the 1,000 has