The Medical Effects of the Nagasaki Atomic Bombing
Medical aspect
The Effects of the Nagasaki Atomic Bombing on the Human Body
Acute phase
Rate of deaths due to the atomic bomb
Frequency of acute symptoms
Bone marrow
Early phase of late effects
Atomic bomb cataract
Chromosomal aberrations
Late atomic bomb effects
Thyroid cancer
Breast cancer
Stomach cancer
Excess relative risk of malignant tumors by site
Multiple primary cancers
Mental effects
Physical aspect
Physical damages
Map of damage
Physical effects
Blast wind
Heat rays
Atomic bomb survivor database
Estimation of radiation dose using the ESR signal from teeth
Radiation dose and death rate
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Japanese/English   Japanese
Chinese   Chinese
Korean   Korean
The Effects of the Nagasaki Atomic Bombing on the Human Body
The injuries inflicted by the atomic bomb resulted from the combined effect of blast wind, heat rays (radiant heat) and radiation and surfaced in an extremely complex pattern of symptoms. The death toll within a distance of one kilometer from the hypocenter was 96.7% among people who suffered burns, 96.9% among people who suffered other external injuries, and 94.1% among people who suffered no apparent injuries. These data show that the deaths occurring immediately after the atomic bombing were due not only to burns and external injuries but also to severe radiation-induced injuries.
This brochure provides an outline of the medical effects of atomic bomb exposure such as acute atomic bomb disease (the period from the bombing to December 1945), late atomic bomb effects such as keloid and cancer (the period from 1946 to the present) and intrauterine exposure. Although there is some difference of opinion among researchers concerning the chronological classification of diseases (the following categories), acute phase in a broad sense, early phase of late effects and late atomic bomb effects are followed in this brochure.
Acute phase of atomic bomb disease
Phase I: Early acute phase, acute phase: up to 14 days after the bombing
Phase IIa: Mid-acute phase, sub-acute phase:15 to 35 days after the bombing
Phase IIb: Mid-acute phase, sub-chronic phase:36 to 60 days after the bombing
Phase III: Late acute phase, chronic phase:61 to 120 days after the bombing
Late effects: Early 1946 to the present
Early phase of late effects
Late atomic bomb effects (particulary the malignancies)
Information on radiation dose, medical examinations and causes of death among atomic bomb survivor health handbook holders is stored in the center’s computer database. This brochure includes the results of epidemiological studies on atomic bomb exposure and health conducted on the basis of this information.
Atomic Bomb Disease Institute