“Drink this much Human Blood Every Day! — Drink a full big glass of Human Blood every single day to get plenty of B Negative — one thing your undead body doesn’t store up. Stay young the Vampire way! “
What’s “B Negative”?
Well, it’s a blood type – not a substance. The blood type indicates what kind of antibodies and antigens are in the blood. There are eight main blood types but a total of 30 are medically recognised.
Less than 2% of people world-wide have this blood type so if a vampire really had a taste for B- then they would be quite a fussy eater.
So someone decided to make a nice infographic, but they have demonstrated their basic understanding FAIL.