https://www.medicaldaily.com/werewolf-syndrome-vampires-disease-and-walking-corpse-syndrome-real-medical-402418

https://www.twindoctorstv.com/real-life-vampires-medical-condition-or-folklore/

https://www.medicaldaily.com/real-life-vampires-drink-blood-383126

https://www.bbc.com/future/article/20161031-the-real-life-disease-that-spread-the-vampire-myth

https://www.livescience.com/40787-health-conditions-create-real-halloween.html