|The following is based on the canceled Fallout movie and has not been confirmed by canon sources.|
In the Fallout film treatment, Max refers to some mutated villagers as Fallout freaks. He comments that they “Came out of their vault too early. Nothing of value inside there, unless you like your steaks with hair on the inside.”
They probably suffered different mutations, but cannot be classed as fully human anymore. The one seen in the film treatment was a two-headed boy waving from a walled village.