A group of around fifty stayed at the hospital. It was quite a large group for the area, but they weren't a threatening group. In fact, there had been some cases where other nearby groups had approached the one known as the Doctor and asked him for help.
There would be times when injuries would occur, or there would be those that got incredibly sick and needed treatment; however, there weren't many left in the world who knew how to treat wounds and attend to the sick.
When the attack began, the hospitals were rammed with patients, and at first, whatever was being passed on by these zombies had a delayed effect on humans. It would take a while for them to activate, and it was also the reason why the hospitals were some of the most overrun places, filled with zombies.