Your thought process is as ever flawed. Nowhere have I said there is no immunity. I merely pointed to an article that suggests a couple of individuals appear to have been reinfected so it cannot be taken for granted that recovered once means immune forever in all cases. It also means that your CLEAN badges won't be getting produced any time soon.
Two cases of possible re-infection against the known fact that 10s of thousands have gone through the process of catching the virus becoming an infected carrier coming out CLEAN with no evidence they are, or can be re-infected.
As I said before, my idea works with obvious positive outcomes; your idea leads to dispair and viral death numbers the scientists can't imagine.
Logic would suggest, should you split the CLEAN group 50% possible reinfecter and 50% possibly immune, the net outcome is still positive.