Is there a test, or, what are the chances that there will be a test, to check if somebody already had covid19?
I know of one that’s in the works https://www.sciencemag.org/news/2020/02/singapore-claims-fir...
I have seen other talk about such tests on Twitter but it’s too difficult to find it now.
Such tests seem to be called antibody tests or serological tests/assays.
EDIT: this twitter thread discusses such tests https://twitter.com/nachristakis/status/1240689935557865472?...
There are also some commercial antibody tests, which have some error rate and as all antibody tests can identify the virus after 7-10 days after onset of symptoms.
https://www.ndr.de/nachrichten/info/15-Coronavirus-Update-In...