enget equivalent in man) causes some detectable changes in blood(such as the breakdown of the hemoglobin and cell membrane), doses near to 100 rems usually have no immediate harmful effects. Doses above 100 rems cause the first signs of radiation sickness including nausea, vomiting, headache and the loss of white blood cells. (http://Iibrary.advanced.org/3471/noNetscape/radiation-effects-body.html). Doses of 300 rems or more cause temporary hair loss, but also more significant internal harm, including damage to nerve cells and the cells that line the digestive tract. Severe loss of white blood cells, which are the body's main defense against infection, makes radiation victims highly vulnerable to disease. Radiation also reduces production of blood platelets, which aid blood clotting, so victims of radiation sickness are also vulnerable to hemorr
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