I’ve got bad news for them… Vampires are mathematically impossible.
Seriously, these researchers have conclusively demonstrated (PDF) that vampires would wipe out the human population in just two and a half years… It’s pretty similar to the zombie study I posted a while back.
Let us assume that a vampire need feed only once a month. This is certainly a highly conservative assumption given any Hollywood vampire ﬁlm. Now two things happen when a vampire feeds. The human population decreases by one and the vampire population increases by one.
Sounds like a reasonable assumption right… Here’s the conclusion…
“We conclude that if the ﬁrst vampire appeared on January 1st of 1600 AD, humanity would have been wiped out by June of 1602, two and half years later.”
It seems this study was deemed quite controversial by other mathematicians and an economist who argued that other factors should have been considered. You can read about that where I found it – here.