Vampires

Origin
The legendary vampire was inspired by Vlad Dracula, yet it was brought to fear by the author Bram Stoker in his 1897 novel of the same name, has inspired countless horror movies, television shows and other bloodcurdling tales of vampires. Vlad dracula was known for drinking the blood and eating the flesh of his enemies and or his own people yet he has killed over a estimate 10,000 people during his reign it is hinted it was more than that estimated 100,000 from soldiers to his own people.

Folklore
General: A vampire is a entity from olden folklore that describes a being that subsists feeding on the blood or other known as the life force of the living. (Mostly used for either living or undead beings.) European Folklore: In the European folklore, vampires were described as undead beings that would commonly visit their loved ones and caused mischief or deaths in the neighborhoods that they had inhabited while they were alive. They wore shrouds and were often described as bloated and of ruddy or dark countenance, markedly different from today's gaunt, pale vampire which dates from the early 19th century.

Overall Folklore: Vampiric entities have been recorded in most cultures around the world but the term vampire was mostly popularised due to the Western Europe after reports of an 18th-century mass hysteria of a pre-existing folk belief in the Balkans and Eastern Europe that in some cases resulted in corpses being staked and people being accused of vampirism similar to the witch hunts in salem.

Modern
A modern times progressed the legends around Vampires were constantly changing from adaptations of Bram Stroker's Dracula to Twilight, the current age has changed for vampires, some have them being immune to their basic weakenesses and others having them start as viruses. In recent years the vampire mythology has been turned more into a split of Romance and Horror, having a male or female vampire falling for a human.

Weaknesses
Everything listed is from folklore. The weaknesses listed aren't known to be factual by any given knowledge.
 * Sunlight.
 * Stakes to the heart.
 * Holy water.
 * Holy grounds.