[SecAmndmt]

But they do have the right to make it a condition of employment. Hell, they can make abstinence from Nicotine a condition of employment, or Flu vaccin

Not really. They can set workplace conditions, but anything which sets conditions outside of the workplace and work hours, they have no right to set.

Else, let management be responsible for paying employees for 168 hours each week, including vacation. Mask wearing and hand washing are fine. Stay home when sick is fine.

[Mariner]

“but anything which sets conditions outside of the workplace and work hours, they have no right to set”

Legally they do.

Whether they have a natural right to do so is a separate discussion.