Survey sent via email at work after my boss asked me directly if I've been vaccinated (no). Do I need to retain an attorney?

There is no way I would answer that. We have HIPAA for a reason. Your employer does not have the right to ask you these questions about your personal, private medical choices.

In response Amy Freedom to her Publication

Only people mentioned by @PKisFunny in this post can reply

In response P.K. PKL to her Publication

It was stated in the email it's supposedly anonymous. I doubted it, which was why I was careful with my answers.