In Fallout 1 and 2 the nature of ghouls was a bit more vague and it was implied that they were all exposed to small concentrations of aerosolized FEV, likewise with deathclaws and radscorpions and such
Bethesda kinda put that by the wayside which tbh is fine, it’s supposed to be 1950s super science after all
Um pardon me but Harold is canonically an FEV mutant, NOT a ghoul
In Fallout 1 and 2 the nature of ghouls was a bit more vague and it was implied that they were all exposed to small concentrations of aerosolized FEV, likewise with deathclaws and radscorpions and such
Bethesda kinda put that by the wayside which tbh is fine, it’s supposed to be 1950s super science after all