SPOILER: Realize what happened to the baby?
Hey, you guys know what happened to the baby, right?
They took the mom and the baby deep into the radiated wasteland, where Banderas himself was having grave difficulties due to radiation sickness.
The baby is less than a week old. It doesn't take a rocket scientist to figure out what happened to him!
After being directly exposed to intense radiation setting off Geiger counters, the baby almost certainly would have died of radiation poisoning within 72 hours of the exposure.