Ark

Ark is the sterilized facility dedicated to preserving the future of humanity through the isolation of uninfected children from the rest of the world.

History
When the Redivivus parasite began spreading in earnest, people began to panic. A plan to ensure humanity's survival was cobbled together, leading to Ark.

Children were indiscriminately kidnapped and put through vigorous screenings and procedures. Those who failed to meet the criterion, particularly the older ones, were discarded. It was too much effort to return them to their homes, so they were dropped off at the closest point to civilization.

Many, such as Levi, were easy pickings for the Redivivus.