• Why should I not order one of those antibody tests?

  • Because if it comes back negative, you should stay at home. If it comes back positive and you’re terrible at maths, it’s 50/50 as to whether you’re actually positive and you could still be carrying the virus and passing it to others, so you should stay at home.

  • it’s 50/50

    More like 90%+ for a positive result given the real life sensitivity and specificity values of the test.

    The 50/50 odds for a positive result were from a contrived example.

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