There was an abortion in, IIRC, Sweden (it was one of the Scandinavian countries) is 1965 (again, IIRC-- it was sometime mid-60s), and tissue from this fetus was cultured, and has been used world over for experimentation. Not tissue directly from the fetus, but tissue cultured from it. Most of the vaccines developed since between 1965 and the end of the 20th century were developed by a man named Maurice Hilleman, and he used to get cultures from Sweden for his experiments.
So, basically, most childhood vaccinations owe their inception to this aborted fetus. This gets some religious feathers ruffled (the ones who do enough research to know about it).
One Roman Catholic mother had refused to vaccinate her children on the grounds that it somehow supported abortion. She wrote a letter to her bishop, and got a reply back from someone pretty high in the church telling her she was dead wrong. It wasn’t the answer she wanted, but it basically said that yes, abortion is wrong, but this fetus was already aborted, and that was over with, and there was nothing that could be done about it. On the other hand, vaccines saved lives. They saved the lives of children, especially, and they saved the lives and health of unborn children-- a case of rubella could easily cause a miscarriage or stillbirth. So good Catholics had a duty to vaccinate.
I don’t know how widely the letter was distributed (the text of it was in a book about vaccines that I read, though), nor how how widespread the knowledge of the role of that one aborted fetus was in vaccine development anyway.
I do know that I have heard some fundamentalist Christians get their information wrong, and try to claim that every single vaccine-- every syringe-- has tissue from a newly aborted fetus in it, and abortion is therefore necessary to continue to make vaccines, so they oppose vaccines as part of their opposition to abortion. Trying to explain to them that they are wrong is mostly met with them sticking their fingers in their ears and going “LA LA LA LA LA!”
So, yeah, there is some right-wing religious objection to vaccines. It’s based on sheer ignorance of a very high order, and a different ignorance than the ones that lead the left-wing woo people to reject vaccines, but it’s there.