you gotta remember too, irwin is a training base. aka NTC or the national training center, they focus on desert warfare, not medical training, so while they would have a medical center and staff to deal with injury and sickness, they wouldn't have anything close to a virology research department. plus you have to take into account the reduction in staff due to the apocalypse, desertion, etc. plus, their priority would be the soldiers, not some drunk french chick. if i was them i'd keep her locked up until i had a free moment and felt like dealing with her.