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Radiation Health Effects
If you are interested in the research activities of a specific department, please see the individual department page and its current research highlights. For further information, go to Frequently Asked Questions about atomic-bomb survivor research, Basics about Radiation, or the RERF Glossary.
Early effects on survivors
From several months to several years after the atomic bombings
Acute radiation syndrome : epilation, reduction in the number of blood cells, purpura, nausea and vomiting
Acute death due to radiation
Radiation cataract (lens opacity)

Late effects on survivors
From several years after the atomic bombings to the present day
Solid cancer risks among atomic-bomb survivors
Site-specific cancer risks among atomic-bomb survivors
Leukemia risks among atomic-bomb survivors
Benign tumors
Deaths due to non-cancer diseases
Chromosome aberrations
Somatic cell mutations
Effects on the immune system
Effects on physical growth and development
Effects on the aging process

Effects on the in utero exposed
Mental disability and growth impairment among survivors exposed in utero
Cancer incidence among survivors exposed in utero

Genetic effects
Many hereditary endpoints have been studied.
Birth defects among the children of atomic-bomb survivors
Sex ratio among the children of atomic-bomb survivors
Chromosome aberrations among the children of atomic-bomb survivors
Blood protein mutations among the children of atomic-bomb survivors
DNA studies of the children of atomic-bomb survivors
Mortality and cancer incidence among the children of atomic-bomb survivors

Cancer mechanisms
Why does radiation cause excess cancers among the atomic-bomb survivors?
Why do some tissues appear to be more radiosensitive?
Genes that promote tumors. What turns them on?
Genes that suppress tumors. What turns them off?