This is a hospital-based sentinel system. It wouldn't actually evaluate policies. It would collect information on an ongoing basis about unusual hospitalizations.
We actually have a similar system around famines. There is an internationally funded system that reports indicators on famines into a database that allows for an independent assessment of risks. This goes straight to member states. It would still provide information to WHO and member states, and would be an additional source of information, other than the self-reporting nations.