[lmm]

Requiring restaurants/gyms/etc. to require customers to be vaccinated.

[ethanbond]

Yep, states have more or less complete authority to mandate things like this.

https://tile.loc.gov/storage-services/service/ll/usrep/usrep...

[wellthatsawrap2]

He asked if it had ever been done before.

[svnt]

It is a basic tragedy of the commons problem. Solving this is basically the reason why we have government.