I. Time Relationships Radiation injuries fall roughly into three time periods; 1. Immediate - from a few minutes to a few hours. Very massive doses are needed to produce these early symptoms. 2. Delayed - Some symptoms in the first couple of days and more severe symptoms coming after ten days to two weeks. 3. Late - Occuring after years. Immediate — Nausea, vomiting, diarrhea. only to reappear after a few days. These symptoms may disappear Then they will be accom panied by bleeding from the gums, and bowel, loss of appetite, weakness, loss of hair, The white blood cells are sharply reduced and somewhat later the red cells are reduced, patient becomes very susceptible to infections. The Death is frequent in this group of patients. Delayed - Same as immediate but usually less severe, Men in this group lose their sperm and women often stop memustrating, but if the people live, these functions recover too. Reddening, blistering or tanning of the skin is rare in pecple exposed only to gamma rays, but my happen to people who get their hands contaminated with fission products and get a heavy dose of beta rays. MEDICINE, HEALTH & SAFETY po’ ARCHIViEL