It's not the 'proof' part of "proof of vaccination" that's the problem. It's compelling an employee to put a foreign substance into their body. This is also muc

It's not the 'proof' part of "proof of vaccination" that's the problem. It's compelling an employee to put a foreign substance into their body. This is also much different than requiring an employee NOT ingest a substance. The situation you've created here is akin to restricted speech vs compelled speech (drug test the former, vaccine the latter).