I had symptoms that could have been corona symptoms last week. Unfortunately the testing capacity in my country (Germany) is not sufficient to test every person with symptoms at the moment, so only people who had verified contact can be tested, which I didn't. It would be very useful, though, to know in hindsight whether I had it, since this would probably make me immune and thus make me much more flexible. For example I could help old or infected people without having to fear infecting them or me.
So is there or will there be a way to test later on whether I had it or not? Or will I never be able to know?