The mythology of vampires dates as far back as 4,000 B.C. it was during ancient Sumerian and Babylonian times. The myth talks about a demon who was not buried right and returned to earth to suck the life out of everyone it encountered. However, the vampire folklore spin on the mythology of vampires speaks about soft blurry shapes (no bones) with red glowing eyes and a sharp stout that exhausted its victim's blood. Nothing like the bodily captivating hunk of a man/woman portrayed in today's version of vampires. But the mythology surrounding vampires didn't stop there. The divergent variations of myths, superstitions and urban legends arose from the different facets of religions as well.
Let's look at the Catholic and Christian churches.
It is said that vampires were derived from the "dark ages." This was during a period when religions weren't seeing eye to eye. It was so much confusion and inaccurate accountability (history of events) during that era. The Catholic church was against other churchs and vice versa. So, naturally when people can not explain misfortunes surrounding them, they look for other explanations - no matter how far-fetched they may seem. For example, China's culture as it relates to vampires is that vampires were living corpses that could not speak and could only hop and had overly long disgusting tongues. India on the other hand believed that if people were not cremated properly they would return as deformed demonic spirits that could shift into all shapes and sizes; for instance, a spirit was capable of taking on bite-size forms - no bigger than a thumb and digestible! Unfortunately, digesting micro spirits also meant havoc for your intestines; in some cases - death. There are many mythologies about vampires with no right or wrong answers. The one agreeable factor is that, it's all relative to individual's beliefs.