Shade has no native
vampirism or vampiric possession.
Blood-drinkers in nature
There are small animals (eg insects) known to supplement their diets by drinking blood.
Folklore
As it happens, there is no direct equivalent of the vampire in any of Shade's known folklores either. Blood-drinking by villains is generally symbolic for savagery, superstition or sex.
Blood cults
According to
Suitov Iceheart,
Twine Wars era Shade does have some blood cults (based on superstition and bad
magoscience rather than
religion).
- "ritual bloodletting, chanting, criminal damage ... It all sounds quite juvenile" --Iceheart [1]
Offworld strains
OOCly, Shade's lack of vampirism is easily explained by
Shade's author not being interested in writing vampire stories.
Shade's sapients and animals cannot and will not contract most naturalistic/virally-transmitted kinds of vampirism (see Shaded genetics), while Shade's author is not interested in playing with vampirism that affects the 'soul' or simply 'turns people evil'.
There is room for discussion here. If a good story or intriguing science is involved, Mutt's more likely to take an interest. A case in point is They Never Drink Wine -- too funny to pass up.