That’s an easy one....fall of man and all.
You should try telling that to the poor child's parents... or maybe not.
If a pregnant woman happened to be exposed to radiation, and had her child come out that way, I'm sure you'd claim that the fault of the fall of man, too.
Besides, it's amazing for all the sinning so far, all of us aren't turning up like that. Only a minor percentage seems to be paying for the fall of man, ay?