RERF succeeding ABCC has carried out laborious studies on medical late effects of radiation exposure on A-bomb survivors in Hiroshima and Nagasaki for over 30 years upon establishing a fixed population. It is expected that much data on A-bomb radiation effects will be accumulated.
The studies to date have revealed as late A-bomb radiation effects increased incidence of neoplasms, particularly leukemia, thyroid cancer, breast cancer and lung cancer and existence of chromosome aberrations of peripheral lymphocytes among the A-bomb survivors. There has been found increased occurrence of microcephaly in in utero exposed children. Fortunately, however, there has been observed no increase of genetic effects in the children of A-bomb survivors, nor increased mortality rate of exposed survivors by diseases other than cancers.
With regard to the difference in quality of radiation between Hiroshima and Nagasaki due to the difference in kind of A-bomb, response to equivalent radiation dose is higher in Hiroshima than in Nagasaki, indicating a difference in radiation effects.
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