https://www.statnews.com/2021/02/23/federal-law-prohibits-employers-and-others-from-requiring-vaccination-with-a-covid-19-vaccine-distributed-under-an-eua/

Can't be required to take the vaccine for covid 19.

If it really is a HHS document you are required only to fill it out if an OMB number is on the document. Verify the number as well.

https://www.law.cornell.edu/cfr/text/16/1.101

Had to edit previous posting, wasn't correct.

https://www.statnews.com/2021/02/23/federal-law-prohibits-employers-and-others-from-requiring-vaccination-with-a-covid-19-vaccine-distributed-under-an-eua/

Also does the survey utilize your SSN in any way? If so there should be an OMB number associated if there isn't refuse to participate as they can not request your SSN without one iirc.