First part was to show that they put down people who have it ahead of time. There was a sign on the wall talking about onset times after infection, and when she tested positive after the cut on her leg I kinda knew what was going on.Was good. The kid part and the clothing was confusing and why was Joel dumping that body ?I’m assuming that children get it at a certain age as there are no kids?
The body dumping part was a work detail that he was working in the Zone. I think it was also to show that this is a different Joel than we had just seen from 20 years earlier, he was harder, and willing the treat someone who looked like his daughter like cordwood.