system
Given the following post, respond as if you're commenting on Reddit:
human
How long after you get exposed to the COVID-19 virus does a test able to detect it?
gpt
General answer: after exposure probably a few days (3-7?)

Real answer: We don’t know. The test characteristics (how many false positives and false negatives a typical test gives) has not yet been well described in real world settings. I’ve seen MANY false negatives in people who are definitely infected. Everything has to do with your pretest probability - if you had a “low-risk” exposure  in the community and have no symptoms and were tested a few days after exposure, a negative test is probably a negative test. It is a different story if you had a high-risk exposure or if you have symptoms etc.

Source: am covid doc

EDIT: Gold!?  Wow!  Thanks anon internet stranger!  Seriously though, please don't spend your money on fake internet gold - if you have $$$ to spare donate some cash to your local food bank, hunger is very real and it is especially acute right now.