4 ms·

Yes, frequently. I explained one such case in my edit (which I think made it in prior to your comment but perhaps not).

• 6nf 3y ago
  Well if the treatment depends on the test outcome why wouldn't you just test every case every time?
  • n8henrie 3y ago
    Because treatment doesn't always depend on the test outcome.
    • 6nf 3y ago
      Er so then don’t test in those cases? I don’t see your point.
      • n8henrie 3y ago
        Yes, exactly. My point? I'm just answering your question, not sure what you're getting at.