I’d say that happens when the four quarantined individuals are symptomatic. He was already very sick when he started receiving treatment. I will not be surprised if he dies.
No? Just watch.
Most people aren't going to analyze what's happening as carefully as you are. They're going to become terrified at the prospects of further spread and contamination if this man dies.
If his relatives become symptomatic, hysteria will ratchet up even further.
Of course, now that his family is being moved to "an undisclosed location" for quarantine, the PTB will be able to control what news we get about their fate.