_3- UCRL-3644 A SUMMARY AND EVALUATION OF THE PROBLEM WITH REFERENCE TO HUMANS OF RADIOACTIVE FALLOUT FROM NUCLEAR DETONATIONS Hardin B. Jones Donner Laboratory of Biophysics and Medical Physics University of California, Berkeley, California January 14, 1957 ABSTRACT The tolerable amount of radiation exposure to humans is probably less than formerly estimated. It is shown, however, that accumulated effects of the low-level world-wide exposure to radiation from fallout to date is rel- atively small. detectable. The genetic effects are not large enough to be statistically The health effects, as expressed in life expectancy, are much smaller than those of such factors as infectious or chronic disease, metabolic disturbances, smoking, obesity, lack of exercise, and environment and marital status. strontium-90tevele-to-be-expected-inthenext-two decadesindicates,however,thatboneirradiati on may become détectably -Rarmfur.

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