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前言有关广岛市原爆幸存者和白血病发生的近年来动向已经有过一些报道。据调查,整个50年代广岛原爆受害者白血病死亡率最高,以后则下降,并明显减少。然而,正如下面的材料所表明,即使现在也不能认为白血病死亡率低于全国平均值。前几年,作者曾报道过1971～1975的调查结果,本文就直到1978年为止的调查资料作进一步的分析。
Preface There have been some reports on recent trends in the occurrence of primary blast survivors and leukemias in Hiroshima. According to the survey, the death rate of the leukemia among Hiroshimahara blast victims was the highest throughout the 1950s, but dropped thereafter and significantly decreased. However, as the material below shows, even now, the mortality of leukemia can not be considered below the national average. A few years ago, the author has reported the findings of 1971 ~ 1975, this article on the survey data until 1978 for further analysis.