I realized a very good thing to do is do answer, video record it, and don't answer any questions. Ask them questions to see whether they are in fact prying into your medical information to see whether you got it. If someone else in your house did get the vax, you can see whether they know that. Just don't volunteer any information in your questions, e.g. "Why, is there someone unvaccinated in this house? What do your records show? I just want to be sure the records match the facts." but force them to answer and ask for some contact so you can get back with them once you've asked everyone in the house whether they're vaccinated.