Geographical Variation in Leukaemia Mortality in Relation to Background Radiation and Other Factors

rhere is no doubt that the risk of developing leukaemia can be increased by exposure to ionizing radiations.but it is not clear whether this effect is produced by all types of exposure or whether it is limited to certain levels of dose and of dose-rate.Cases have been produced by exposure of the whole body to doses of y rays of the order of 100 to 500 rads given within a few seconds as a result of the explosion of atomic bombs (Folley, Borges, and Yamawaki, 1952;