[MagnumOpus]

Do you trust Taiwan’s data? They contained and eradicated the disease even more effectively than the Beijing regime, without thousands of deaths and millions of infections.

So clearly there are ways to check the spread and cut out 99% of deaths. (They are also not wizardry or witchcraft. Mandatory masks in public, temp measurement at schools and public buildings, quarantines at entry and positive diagnosis enforced extremely strictly by law enforcement, and tracing the infection chain. That’s literally it.)

[SpicyLemonZest]

But I think we're getting off track from the original discussion here. I strongly suspect Taiwanese disease control experts would identify a quarantine policy applying only to a specific 4 year age bracket as what a commenter upthread described as "half-ass measures"; a serious attempt to control the virus would have to apply to everyone, since everyone can spread it.