The vampires took over 200 hundred years ago. Tired of hiding themselves from the world. They separated children away from parents, tore families apart. They put us all in designated colonies based of blood type, gender, what use we were to them. They only time we we mixed were in the breeding colonies. Were they hand pick you and match with a male based off blood type, personality and what they wanted the child for. They kept us separated to stop from any unplanned breeding. See they didn't want any humans creating strong willed rebellious children.