De Four women were pregnant. No bleeding was observed. Two women menstruated excessively for several extra days with counts at 130,000 and 150,000. They were notconeerned and bleeding stopped without therapy. A slight anemia was observed in 19 people; however, there were adequate physiologic explanations (repeated pregnancies, long-standing menorrhagia, childhood infestations, etc.). SUMMARY & CONCLUSIONS: “2. #175 r. is sufficient whole-body radiation to produce a significant incidence of fleeting nausea, vomiting and diarrhea in an unsophisticated population, 2. 175 4r. is a sublethal exposure, 3. The degree of granulopenia and thrombopenia induced was significant and temporarily alarming, but spontaneous uncontrollable infections and bleeding did not develop, despite skin lesions. 4. A population exposed to this amount of radiation need not be given any therapy other than what is clinically indicated,