vampire exist or not

I think it is real, like i read in the book made by Rebecca Brown. If i am not wrong, the title is Yes We Can Set The Captives Free. The vampires are used in the church of satan to discipline the followers, to torture one of their family to make them won't do the same mistake again. So does the werewolves. Have you read it?

Vampires used to exist but they are not found now,they have extinct from this world. or if they are still there, then there number is very less and they live away from the humans in some jungles and abondoned places. there are certain things that the science do not prove or better to say cannot prove that does not mean that its not happening or present in our world.

I doubt they exist but sometimes normal humans does look like vampire .