There's no concern for the spread of infection if you designate a facility (no matter if it's a sports hall or a cruise ship) for holding and treating only know

There's no concern for the spread of infection if you designate a facility (no matter if it's a sports hall or a cruise ship) for holding and treating only known patients of a single disease. Yes, they're not suitable for quarantine of possibly infected people - but it seems that we're past that stage, with massive community spread, we're not going to quarantine anyone, we're just going to ask possibly infected people to please try and stay at home if it's not too inconvenient; I mean, most countries don't even bother testing the possibly infected contacts anymore.