I don't know why Dr. A keeps saying and apparently believing that his wife isn't contagious. Doug contracted the sickness from someone and she was the only one that was shown in their area that had the sickness.
I know he's a kid and all, but Gus seems so much less mature than most 9 year olds I've experienced. given his upbringing, you'd think he'd be a little more mature, not less, than his age. Wendy even seems more mature than him, and she is at least a year younger than him.
Hard to believe the military (or whoever) just left a 6 year old girl to fend for herself, and it seem