Hi there Kirsty7679 and welcome to our forum!
I can feel the emotions coming off the screen from your post and really want to help if I possibly can.
Firstly, congratulations on being married to a wonderful man for nearly 20yrs - that is worth celebrating!
I have a friend who I respect and do a lot of things with, but he is anti vax and of course its affecting our friendship as I am fully vaxxed. Like your husband, he will happily quote stats and spends a lot of time on line with conspiracy groups, reinforcing his view.
His wife recently confided in me that he is having problems with his job performance at work and with colleagues which is making him even more tightly wound and spiraling down in to his anti vax stance.
This leads me to wonder if there are any deeper personal issues that may be triggering your husband's belief and behaviour? Of course I can't offer qualified advice but think it might be an idea to have a really good chat with him.
Set a time aside, keep things totally non combative, even 'apologise' a little to him if your beliefs are annoying him. Make it clear this is really important to you. This may be hard to do but it sets the scene for him to open up without conflict. Tell him you love him, have had 20 wonderful years with him, respect his rights, and look forward to many more wonderful years.
But you do have rights and can ask him gently about how can you guys go to dinner together, fly to a holiday, book into a hotel etc if he is not vaccinated? What if he gets Covid, how would you both feel? And it there anything at all in his life that he wants to discuss with you as you are really hurting from what he is doing and ignoring the science.
Of course this will be quite tricky and you will need to prepare in advance to make sure the meeting goes smoothly. The most important thing is to keep calm and supportive.
At least you will have given it a good shot to reconcile your differences, I am not sure at all if you can go on ignoring it as it offends you own self beliefs and rights.
I wonder if a chat with your family doctor will help?
I hope some of this makes sense Kirsty7679, and all the very best to solve the situation.
Kind regards, The Bro