i really want to know dammit
If a vampire were to Drink the blood of somebody with AIDS, they would get AIDs and eventually die.
Let me tell you a bit about real vampires.
Here come the downvotes, =). I'll leave links at the bottom for the open-minded, though.
-Any color eyes, only with a dark-colored ring around the outside of the eye, as well as a golden ring around the pupil. - Many will describe this as a "lion's mane."
-Nails --fingernails/toenails-- grow more quickly.
-Hair grows more quickly.
-Typically vampires have moderate to dark brown hair. I have never met one with black or blonde.
-May be preppy, emo, jock, goth, country, rocker, etc. Any stereotype.
-Glassy fingernails, but very hard to break or chip.
-Some have sharper canines, some do not.
-Sleeping in coffins is only if they are...eccentric.
-Elegant walk about them.
-Heightened reaction speeds.
-Heightened Psi abilities.
-Often appear deep in thought, and/or solemn.
-May be anti-social or extremely social. Depends on the personality.
-Enjoy the night.
-Tend to be very nocturnal.
-They all have just as much of a reflection as anybody else does.
-Some enjoy human company whilst other see humans merely as food.
-Only about a third belong to Covens.
-All of the ones I know are very knowledgable about history in general. They are not necessarily "history buffs" by any means, but still.
-Seem to know everything about other peoples' emotions, yet nobody ever knowsmuch about them even though the people "think" that they do.
-May be happy one day, but drained the next day.
-They are not undead.
-They often keep Donors rather than attacking random people. Vampires do not like STD's either, you know; they can contract all of them as well.
-Vampires eat human food for nutrition, although tend to revolve more around fruits & vegetables.
-They drink blood, although a half a cup every week or two is plenty enough to keep them healthy.
-Vampires must pay the bills, work --oftentimes day-shifts--, live in a house --unless they like caves....which is rather strange...--, and everything else.
-Vampires do not instantly become sexy or beautiful after their Awakening; however, for some unapparent reason, they do appear to quite attractive to humans -- even when they do not appear so to other vampires.
-Eyes are hypnotizing when the vampire wants them to be.
-They can smell blood.
-They can smell blood from a person even when it's not been spilled.
-Vampires are not immortal. Bullets, stakes, fire, water, wind, lightning, and a punch to the nose the right way will all kill them. They will all kill you too, though.
-Vampires can be of any religion. Catholic, Satanic, Pagan, Wiccan, Jewish, Hindu, Buddhist, Christian, as well as any other ones out there.
-They always seem to know when somebody is and/or is just about to look at them.
This Answer is becoming entirely too long now, so I shall stop. Obviously they were in no particular order, but were put down merely as they came to my mind.