Scientific point of view of the vampire

Who are the vampires?
Science says that a subset of people affected by the mutation. Causes of these changes set - this increase in radiation levels in the atmosphere, and the deterioration of the ozone layer, and the development of genetic industry. It is enough to make just one small change in the gene level, and people can get very different habits, remaining seemingly the same as before.
People classified as vampires, have characteristics that distinguish them from the rest of humanity.
First, it is the fear of the sun. It lies in the fact that vampires are pale and very sensitive skin, which is hard to tolerate sunlight. There are cases of injury from sunlight on the skin vampire. Therefore, the night - most of the time and waking life vampire. They prefer to sleep during the day because they have a need for rest, like all normal people. Of course, vampires can adapt to the world around them - to live a full life by day and relax at night, but it will be very difficult for them to test. Therefore, for such people is very lucky to work at night.
The next feature of the Vampire - heightened senses. Moreover, all the senses are developed equally well. They see in the dark, distinguish the sounds and smells. This is likely to occur as a result of night life and the organism's adaptation to darkness.
That is why they are easily excitable. Because of the vast number of stimuli vampire mood may change several times a minute, from aggression to mad mad love.
In general, the vampire is described as closed, unsociable personalities. They have more physical strength than most people. Look at the world as if from above, from the side watching everything going on. And, at the same time have a very large force of gravity, which have - that unnatural charm, like hypnosis.
They are characterized by good resistance to disease. Vampires are almost never get sick, different vitality and longevity.
And of course, the main feature of vampirism - blood lust. The blood they need to sustain life, to feel good, or simply because of their physiology. Vampires have the ability to digest the blood, and the desired acid is stronger than that found in normal human stomach.