How long would it take a vampire to drainpipe you the blood?

If you"re a sucker for a good vampire movie, it is in warned ... Dr knife takes two huge bites out of the legend.

You are watching: Why do vampires drink blood from the neck

By karl S. Kruszelnicki


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That sucks: keep this up and there"ll be no-one left - human or vampire! (Source: Getty Images)


If you"re a sucker for a great vampire movie, be warned ... Dr karl takes two big bites the end of the legend.

When movie equipments want come guarantee their investment, they"ll choose an old favourite for the lead role. That"s why Santa Claus, Jesus Christ, Sherlock Holmes and Dracula the vampire show up so frequently.

I love movies, however I also love accuracy. And also that"s why I have to tell you the as much as vampires room concerned, the movie tell girlfriend two big lies about the bite.

First, it would certainly take more than simply a few seconds for the victim to walk unconscious. And also second, if biting the victim turns them into a vampire — well, by currently we should all it is in vampires.

For a vampire come survive, we"re called they need to feed top top the life essence of a living creature — generally their blood. Component of the unnatural process of the vampire getting their nourishing enjoy the meal of blood is the victim falling unconscious — and being collection on the pathway of ending up being a vampire themselves.

Legends of supernatural creatures that endured on the blood or flesh of the living have been approximately for countless years.

The old Persians, Babylonians, Hebrews, Assyrians, Greeks and also Romans each had actually their very own folklore about blood-guzzling demons and spirits.

Similar legends exist across Africa, both North and South America, and also Asia. Yet it to be the 1897 novel, Dracula, through Bram Stoker, that seems to have started the modern European vampire character and subsequent vampire culture.

In 2016, a team of physics students native the college of Leicester in the UK resolved how lengthy it would certainly take an actual vampire to do a real person unconscious from a bite top top the neck.

They assumed friend would fall unconscious when you lost around 15 per cent of her blood. Now a typical and worthy blood donation is roughly 10 per cent of her blood volume. However the physics students probably figured that a bit an ext blood loss (15 per cent) an unified with the shock of someone else"s canine this stabbing right into the carotid artery in her neck would make friend swoon.

The students likewise assumed that the vampire"s fangs made 2 tiny puncture holes every 0.5 millimetres across, and that the victim"s blood would come the end under a push of approximately 100 mm Hg.

Using this numbers, they came up v a time that 6.4 minute to drain 0.75 litres that blood from the carotid artery. (By the way, the factor that it takes much longer at the blood bank to drainpipe about fifty percent a litre that blood is the it"s seeping native a vein at low pressure, rather than squirting indigenous an artery at high pressure.)

But in the land of movies, the victim faints within a couple of seconds. That"s quick enough because that the vampire to do a quick getaway prior to the hero arrives v a crucifix and garlic. Sadly, it could not enough time for the vampire to obtain a suitable feed.

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Vampires are a dice breed

But there"s one more problem — what if there space no more humans left come bite!

Let"s begin with simply one vampire. Lock plunge your fangs right into the neck of a victim, who soon joins castle in the vampire club. Now we have two vampires.

Now let"s do a an extremely conservative presumption — let"s assume that vampires need a feeding only as soon as every month. In the first month we begin with one vampire — yet in the second month we have actually two.

In the 3rd and 4th months, we twin and twin again to four and also then eight vampires.

By 10 months, there room 512 vampires. Twenty months gets us to half-a-million vampires, if 30 months has actually half-a-billion vampires roaming the plaaufdercouch.net in search of their next meal native a human.

Thirty-three month after the very first vampire had actually their an initial bite, there are now 4 billion vampires — and somewhat fewer than 4 billion fairly nervous humans remaining.

And bingo, 34 months, or much less than 3 years ~ the first vampire had actually their hot very first liquid meal, every human being on the plaaufdercouch.net has been turned into a vampire.

Suddenly, there is no food remaining and the vampires space left through the combination of immortality and an unquenchable thirst.

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But one way to guarantee your remaining person stock would certainly be to death all various other vampires by steering a wood stake with the heart of each newly produced vampire.

Yes, the vampire bicycle of life would continue, yet then castle would have actually no vampire friends.

So currently we have the astonishing stats on vampires. However don"t be fear — it"s just a movie ...