In the Dresden Files by Jim Butcher, they can be held back by any symbol of power that the wielder has faith in and the stronger the faith, the stronger the symbol. For example, Harry, the main character and a wizard, uses a pentagram instead of a cross because he has faith in his magic.
I've always thought that was pretty cool and it means that theoretically a devout Pastafarian could use the symbol of the Flying Spaghetti Monster to protect themselves from vampires.
Before 2020 or so, I had a lot of faith in humanity. Does that mean I could just touch vampires to death, or would I need to like throw a child at them?