Abchanchu

Shapeshifting into the forms of vulnerable old men, these hideous Bolivian vampires will wait at the sides of roads and walkways, pretending to need help and begging to be allowed into the houses of passersby. If given this permission, they will drain the blood of their victims, or leave them with fatal diseases that will kill them within a week. The only way to protect oneself from an attack is to wear an amulet containing garlic oil.