Vampire lore has been around since before the advent of writing.
Their origins are lost in the history of the spoken word. There are
legends and tales told in nearly every culture known about those
who died and came back to feast on blood or the flesh of children.
They are known by many names: adze, asanbosam, Baswang, Bhūta,
BrahmarākŞhasa, chupacabra, Cihuateteo, impundulu, jiang shi,
Kuntilanak, Langsui, Leyak, Loogaroo, manananggal, mandurugo,
Matianak, Nosferatu, Patasola, Penanggalan, Peuchen, Pontianak,
Prét, ramanga, Soucouyant, Tunda, vampires, and vrykolakas. While
the vast majority feed only at night, it has been theorized that
the proliferation of such legends is tied to the inate human fear
of the dark.
I know about vampires because I go to a supernatural boarding
school in England, and there are different types of supernatural
people there. That's how I know.