you've been surving in an abandoned hospital for a few months now, the one you worked part time in. you've bordered off the doors so no infected come into any of the two floors that you have been living in, the roof and the level below it.

one day you hear some sort of explosion below the building and before you know it one of the boarded off doors gets kicked down by a teenage girl. "oh!..hey, uh..you a..nurse?" she pants, holding a shotgun in her bloodied up hand.