Examples from the Web for vampirism
You could say that the metaphor of vampirism being a… release is probably true.
Whatever placidity there is is attained by means of vampirism.The Kempton-Wace Letters|Jack London
There are many well-authenticated cases of vampirism in France and Germany.
Now that vampirism, by the evocation of the dead, is joined to demonism, the victim is worse than possessed.L-bas|J. K. Huysmans
It has been asserted that Bertrand was a vampire; but there are absolutely no grounds for associating him with vampirism.
In a word, it is Vampirism, pure and simple, on the psychic plane.H. P. Blavatsky|Alice Leighton Cleather