What are Thin Bloods?
Vampires have always suspected that sooner or later the blood would grow too thin to sire a next generation of vampires. The 13th generation is the last generation of vampires which can be described as having blood of normal strength. Nevertheless their blood is thick enough to sire at least one (sometimes two) more generations of vampires. Called the Thin-Bloods, these are the 14th and 15th generations.
