The number of horror stories about cemeteries is enormous. It is noteworthy that some people sincerely believe in what those stories say. The fear of the living dead subconsciously exists in almost every human being. It could be compared to women's fear of mice: it is extremely hard to explain the nature of the apprehension.
British specialists came across the sickness of the “living dead,” when they were studying the nature of Ebola fever. Symptoms of the disease bear some resemblance to an episode from a classic horror film. After several hours of feverishness, a patient suffers either syncope or a coma, which can often be taken for the state of death. After that, the patient revives, lapses into aggressive state and tries to bite every moving object, whether it is a human being or an animal. The sickness provokes abundant salivation and internal haemorrhage. Saliva and blood falling from patient's mouth create a rather hideous picture in combination with unusual complexion and dull eyes of a sick person.
Bats and wolves often carry rabies in wild nature. These animals, therefore, can often be found in fairytales about werewolves and vampires. Needless to say that our ancestors perceived such patients as something paranormal and highly horrible.
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