Just a couple of days ago I read a short-short SF story titled "Argent Blood", by Joe L. Hensley. (Spoiler: in order to kill a coven of vampires - who run a lu

Just a couple of days ago I read a short-short SF story titled "Argent Blood", by Joe L. Hensley. (Spoiler: in order to kill a coven of vampires - who run a lunatic asylum whose patients won't be missed - the protagonist, and feeding target, poisons his own blood with silver chloride).