When the Reset happened, most of the people perished instantly. The majority of those who survived on the surface died in the following years from the ionizing radiation, hazardous environments and social madness.
Among the long-term effects of radiation which affected the survivors, the most deadly was leukemia. An increase in leukemia appeared about two years after the attacks and peaked around four to six years later. For all other cancers, incidence increase did not appear until around ten years after the Reset.
While there was no verified evidence of increasing mutation levels among the first descendants of survivors, the long term health effects have affected their later generations. A very few of them have visible or noticeable mutations, and were lucky to survive natural selection on the surface. Such mutants are called Deviants by the other survivors. Being unwelcome in almost any survivors' societies, Deviants usually live the lifestyle of loners or hermits, hiding their presence from others. Though most of these mutants die from natural selection, and a majority are sterile – a few of them are still fertile. In some cases, those babies born to Deviants may not be affected by their parents' mutations, and therefore would not be considered as Deviants.