~ ie genetic dafects in the 0.5.4. by a factor of 1/3000 and if the added erpoeure rate fron weaporw teeting wore to contine over many genere- tions the inaresent after 20 to 30 generations would be 1/300th. Por the world population as a whele the increase would be somewhat less. ee WES24ONG Therd would be an everage curtellment of life span of no nove then @ day on/two. the basis far the upper linit of increase in leukesta cesses is etit{ in the resin of hypothesis, therefore, the estimate would lie vetwesn exesatially no inoresse to as much as 2/lOth over the present ‘ Nip / iicidsnse vate of 11,800 cases per year in this coumtry. ! ‘h. Ounoee Whether or not there would be any inorease in bene cancer is quea- tilenable. In any event 1% would be very enall, All of these estimates vitich in absolute numbers add up te a Nigure well belewpresent day experience with sccidentel deaths assume that thece will be no further edvances in the blolocieal eclences with res~ peet to the prevention and treatment of leukesia and bone canser, and in our abality te counteract or protect against the rautavente effecte of tontzing radiation, Acknovledgments The author appreciates very much the assistance given him in the preparation of the manuscript by Dr. Forrest Western, Assistant Direetor for Radiation Protection, and Hal Hollister of the Environmental Sej.ences Branch, both of the Division of Biology and Medicine, USAFC, who mde mny heloful suggestions in the preparation of the manuscript. stile

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