CkCCiat it would appear that this is the case. Certainly it demands the continued annual examination of all exposed Marshallese for the forseeable future. DMs . vt S. Cole, M.D. Ck Ck Rongelapese was discovered at this examination. This case of leukemia occurred well beyond the peak incidence expected as the result of radiation exposure but radiation cannot be dismissed as the causative agent. In my opinion, the discovery of this disease in an exposed person on Rongelap is an extremely disturbing event at this late date following the acute radiation exposure. One of the most difficult problems at the moment is determining the effect of continued low dose irradiation of a given population. It is prudent to assume that there is no level below which some damage may be produced, Although I am not able to conclude with certainty that this case of leukemia resulted from radiation, Med hd kee r lk Submitted: 203 October 18, 1972