Vampires explanation.

Modern researchers have found that outbreaks of hunting vampires are almost always coincide with outbreaks of rabies in Europe. In general, the parallels to hold a snap. Judge - the vampires are afraid of bright light thrown on people and bite them, and then bitten themselves become vampires. These are two typical symptoms for rabies - photophobia, and aggressive behavior. And if we add that rabies is transmitted by the bite (ie, after the contact of blood and saliva), all doubts soon disappear.
The myth that the creatures of the underworld suck blood, apparently, went from bats. These beings are carriers of the disease. Actually, they do not attack people, but there are different situations. For example, when the animal is frightened and is trying to defend. This fact is due to the fact that bats suck the blood of their victims - other animals. Here you have the myths about vampires.
Add to this the numerous graves of living people who have fallen into a coma, and other liturgical sleep medicine and wisdom do you explain the fact that so-called "revolt of the coffin." Next - the human imagination. For example, a stake driven into the heart or a silver bullet basically kill any living creature ...