This doesn't actually address either of the points I raised. You still have to ration infection. You still create a government imposed class system. You still h

This doesn't actually address either of the points I raised. You still have to ration infection. You still create a government imposed class system. You still have your liberty dependant on whether or not you allow the government to infect you with a deadly virus. Even putting aside the myriad of ethical reasons that this is a bad idea. Your solution still doesn't have a way to deal with your non-immune class members seeking out infection because they can't/don't want to wait for their government virus ration.