A 3-year-old boy exposed to the Nagasaki atomic bomb developed A-bomb sickness about a month later and was admitted to Ward 8 of the Omura Naval Hospital on September 7, 1945. On admission, his breathing sounds were coarse and his abdomen was distended. Blisters remained on both hands and feet.

    A 3-year-old boy exposed to the Nagasaki atomic bomb that exploded on August 9, 1945, developed A-bomb sickness about a month later and was admitted to Ward 8 of the Omura Naval Hospital on September 7. When he was admitted, his breathing sounded coarse and his abdomen was distended. Blisters remained on both hands and feet. After the blisters had healed, their crusts adhered to many of them. The scalp of the boy's head was alopecia and scarring formed after the blisters healed. The boy's admission record did not contain any injury or illness related to A-bomb disease, and his progress after admission was also unclear.

　The incubation period before the appearance of A-bomb sickness tended to correlate with the distance of the survivors from the hypocenter. Within about 750 m from the hypocenter, symptoms appeared from the day of the explosion. For those exposed at about 1 km from the hypocenter, A-bomb sickness appeared about 4 days later. For survivors exposed between about 1 km and 1.5 km from the hypocenter, A-bomb sickness appeared on about the 10th day. Those survivors who had no external injuries and no abnormalities immediately after the bombings subsequently developed fatigue, loss of appetite, and fever of up to 40°C. At the same time, many survivors developed neck and neck pain and fever of up to 40°C. At the same time, swollen and painful cervical lymph nodes, sore throat, and hoarseness appeared in many A-bomb survivors. Over the next few days, watery, mucousy, and bloody diarrhea appeared, followed by hematuria. The epilation started as a needle-head sized area in the beginning, and petechial hemorrhages eventually spread over the entire body, and at the same time bleeding from the mouth and gums and epistaxis began.

　Strange herpes-like rashes were observed around the mouths of many survivors. As death approached, it became gangrenous and was accompanied by a pronounced odor. There was no abnormality in cardiac function except for a drop in blood pressure in the final stages. Many survivors developed terminal pneumonia. Many A-bomb survivors complained of stomach pain, but there was no vomiting, although roundworms were observed. Central nervous system disorders, such as visual impairment, appeared in the terminal stages of the disease. The survivors were unable to recognize the number of fingers from approximately 30 cm away. The survivor who did not suffer from CNS disorder did not show any abnormality in his mental condition even in the final stage of the disease, when marked anemia and high fever appeared. Even though the trauma wounds showed a tendency to heal, the granulation eventually became gangrenous and swollen. The injection site became infected and necrosis occurred. (Omura Naval Hospital, Masao Shiotsuki, The Effect of theExplosion of the Atomic Bomb on the Human Body: Reported on September 10, 1945.)