You can't sacrifice the superior computational power of decentralized peoples acting in their best interest and substitute it with some truly wishful thinking that there will exist some superior knowledge that just needs centralized power in order to control a pandemic.
That said, I'm not stupid enough to think that's a good idea, and welcome any innovations in decentralized coordination.
This situation is, of course, a tragedy, but it is also what we have.
I'm sure plenty of authoritarian regimes would love to have information on all sorts of things that health agencies could be made to collect by treaty. How about just "travel?" Let's track the movement of every person from place to place. It's for the pandemic! It's definitely is not part of a surveillance apparatus meant to stifle dissent, not in the slightest.