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Sixty years after the US dropped atomic bombs on Japan, the radiation continues to trigger new cancers and disease.

Misa Imaizumi and her colleagues at the Radiation Effects Research Foundation in Nagasaki and Hiroshima used ultrasound to scan the thyroid glands of 4091 survivors between 2000 and 2003, to look for abnormalities.

They found thyroid disease in 1833 survivors, some 45 per cent of the total, but they also picked up 188 thyroid abnormalities that had developed since previous investigations and treatment a decade ago. This suggests that the effects of the radiation from 1945 are still being felt, especially…

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