So let me get this straight:
He refuses to read the research you've given him, and refuses to do any research on his own, and his only answer for "Why should we vaccinate our healthy children?" is, "Because that's what most people do!"
In my family, the person who does the research makes the decisions. There are certain things that DH leaves up to me, like the children's medical decisions, because I'm willing to spend long hours reading about them. And there are certain things that I leave up to DH, like which cars to buy, because he enjoys researching them and I'd rather watch paint dry. We do sometimes butt heads on some emotionally-charged topics, but the person who has done the most research and has the most logical argument generally decides.
And since the default state of the human body is completely vaccine-free, the person pushing vaccination must come up with good, researched, compelling reasons to inject a healthy child with powerful pharmaceutical drugs that carry with them known, documented side effects up to and including death. The burden of proof is on him, mama, and never let him forget it. If he's unwilling to do his own research and come up with some good reasons to vaccinate beyond, "Everyone else is doing it!" then he doesn't get a say--period. Your children's health is way too important to sacrifice to his ego.
Personally, it would be my hill to die on and I wouldn't give my child "just" the polio vaccine because he wants to, based on nothing but his own insecurities, ignorance, and fear. Until he does as much reading and research as you have, it's not really open for further discussion. You can't use reason to defeat his emotion-based arguments, so why bother getting yourself worked up?
I'm sorry you're going through this. It's never easy when someone we love tries to bully us.