I was hoping for little more follow up about how maybe this was how people with OCD back then were viewed. Or some connection between how people with Arithmomania back then, were turned into folk stories about vampires and witches. Besides the title, there wasn't much connection between how maybe real people with the condition, became a story told to kids, and passed on. Or why did Romania have so many people with Arithmomania that it became a folk story about vampires.

This seems like something that would also be a cool addition to Blindsight. Some further 'realistic' characteristic about how vampires are a real thing. (in that fictional universe of course)