Here's an uncredited photo that was sent to me by my friend Michael, who says it from a LIFE magazine showing a Japanese boy with some radiation burns following one of the two atomic bombs dropped on Nagasaki and Hiroshima during WWII.
I'm unsure if this little boy is one of the lucky ones are not.
While is injuries are not as bad as other survivors, part of the problem is that radiation effects could hit him later in life or even be passed on genetically to his kids who could end up malformed.
Injuries include those caused by the exploding bombs' heat and fire, actual blast injuries, and of course external and internal damages from radiation.
Radiation would also slow down the actual healing process of other sustained injuries, but once the radiation sickness was eliminated, healing did go back to normal.
However, as mentioned, other illnesses did come about - believed to be caused by the exposure to radiation,
Case in point regarding the severity of injuries, is a photo I found over at http://academic.mu.edu/meissnerd/japan-bomb.htm.
Let's hope he or she died soon after, because that looks like many lifetime of pain in this photo.