I assume your questions are directed towards the SinoVac thingy that is being used in Hong Kong and elsewhere.
The EU has started what they call "rolling tests" or something like that. We should have some data in the next couple of months I guess? Would their numbers be more credible that the ones currently in circulation?
The BioNtech vaccine reduces your chances of catching COVID by 95%, if you don't have it you can't transmit it. Everybody in compulsory quarantine has a negative test, or they'd be sent to the hospital instead. No COVID + plus low chance if catching it = illegal imprisonment in my book.