It released radioactive material which contaminated the area where the bombs landed for generations.
The atomic bomb had no effects on WW1 at it did not exist.
It kills them
birth defects
See: Atomic bombings of Hiroshima and Nagasaki
changes in genes
It ended WWII.
Excitement, the war was over.
Scars, Burns, Bruises, Death
Excitement, the war was over.
They all died.
Radiation Poisoning
The devastation of the Atomic Bomb was known but never thought to be needed twice. There was little known knowledge of the effects of radiation.