My new company requires their employees to wear a mask if they are not vaccinated from COVID-19. When I came in for my first day, earlier this week, I saw some people not wearing a mask, and I asked if I was permitted to take mine off. In response, I was asked if I had been vaccinated, and then informed of the policy. This was by the top HR person in our office. Is it legal for my company to enforce this policy, and was it legal for them to ask me if I'm vaccinated?