Delayed effects and the part played by luck or unluck
It is always especially delicate to make a connection between a cause and a delayed effect as such effects very often never appear and because there is no signature of the cause. If luck (or bad luck) intervenes then such effects are known as probabilistic. Clear and measurable effects have been so far only associated with doses in excess of 100 mSv, as the probability of developing a cancer increases with dosage above this level. No matter what the dose, however, no hereditary effects of radiation have ever been observed in humans.
/IN2P3/NEPAL(Source Jean Colin)