old in 1945 are now coming to the age when persons would normally start developing cancer and they are beginning to find more cases in the exposed. As to leukemia, it was stated that in Nagasaki the threshold dose appeared to be from 50 to 100 rads,while for Hiroshima there appeared to be no threshold. MEDICAL WELFARE CLINIC At 9:00 a.m. Saturday morning, the Committee traveled to the Hiroshima Medical Welfare Center and met with Dr. Yutaka Mizuno, Chief of the Countermeasure Section. three areas of work explained that there and that this are are Dr. Mizuno explained that the Center's health control, research, and treatment. He about 95,000 survivors in the Hiroshima area Centercares for about 80% of them. Most of their work is concerned with health control, and they cooperate with the Hiroshima University Research Institute for the research portion, and with the A-bomb hospital for treatment. main work, he said that this is As to health control, their carried out in two ways: 1. a gene- ral examination in which health teams are organized to canvass areas by school district and 2. "close" or detailed examinations of persons who, the general examination indicates, should undergo a more thorough clintcal checkup. RESEARCH INSTITUTE FOR NUCLEAR MEDICINE AND BIOLOGY, HIROSHIMA UNIVERSITY An adjunct of Hiroshima University, this Institute is headed by Dr. Shunzo Okajima. He explained that the Institute's work is 54 lO14bo0