Dracula in White

(from ebookjapan):
One day, Yukiko, a young girl in the hospital, dies, her whole body dried up as if Dracula had sucked her blood. However, despite the bizarre manner of her death, the doctors and the head nurse dispose of the corpse as if nothing had happened. Ayako, suspicious, goes to the morgue in the basement, and finds it to be a den of moving mummies...!