Here's how absurd the testing currently available

Here's how absurd the testing currently available for CV19 is. Someone I know tested positive for CV19, but had mild symptoms. Its been over 14 days and he's not exhibiting any symptoms. He went to get tested again and was told that he shouldn't as he would test as positive due to having previously had CV19. He was told after 14 days and no symptoms, he is OK to go back to work.

So....why get tested at all? After getting sick with whatever, wait 14 days. If you feel better, go back to work. Nevermind not knowing with certainty whether you may be infectious.

We really need a fast test that tells you if you are infectious or not!