Anemia

Anemia is a blood disorder that, in some places, is associated with vampirism. Melton, J. G. (1999). The Vampire Book. 2 ed. p.13-14
It is caused by a reduction in the proportion of red blood cells or haemoglobin compared to other substances that make up blood. 
== Symptoms ==
Anemia causes a pale complexion, tiredness, and, in extreme cases, fainting.
== Vampires ==
All the symptoms of anemia are associated with vampire attacks. 
In Bram Stoker's Dracula, Dr. John Seward hypothesized that Lucy Westenra's illness, in its early stages at least, was her suffering from anemia. It was only later that, instead of her suffering a lack of red blood cells, it was a total lack of blood. Dr. Abraham Van Helsing agreed with this. Van Helsing does clarify though that she was not anaemic, thus dismissing the link between anemia and vampiriam in this work at least. 
== References ==
Category:The Vampire Book