Apparently Beneficial Effect of Low to Intermediate Doses of A-bomb Radiation on Human Lifespan

Abstract
Among about 100 000 A-bomb survivors registered at Nagasaki University School of Medicine, 290 male subjects exposed to 50–149 cGy showed significantly lower mortality from non-cancerous diseases than age-matched unexposed males. This was deduced from the fitting of a U-shaped dose—response relationship. Reasons for this effect in males, but not in females, are discussed with reference to selection of individuals and to hormesis.