the treatment of individuals who develop the Hematopoietic Syndrome of the Acute Radiation Syndrome (H-ARS) following exposure to ionizing radiation. Data from two animal studies are presented in this document. The first (Study AXR01) is a model characterization study, defining a rhesus macaque model of H-ARS. The second Mar 18, 2005 · FACT SHEET Acute Radiation Syndrome: A Fact Sheet for Physicians Acute Radiation Syndrome (ARS) (sometimes known as radiation toxicity or radiation sickness) is an acute illness caused by irradiation of the entire body (or most of the body) by a high dose of penetrating radiation in a very short period of time (usually a matter of minutes). Acute Radiation Syndrome (ARS) may develop in those who are exposed to radiation levels of 50-100 rad, depending on the type of radiation and the individual. Symptoms of ARS include nausea, vomiting, diarrhea, and reduced blood cell counts. Radiation, especially beta radiation, can also cause skin burns and localized injury. All eyes have been on Japan as residents struggle to recover from the earthquake and tsunami. Fears of nuclear radiation leaks persist, raising questions and concerns whether radiation will reach the U.S. and how much of a potential danger it would pose. What is “Presumptive” Service Connection? VA presumes that certain disabilities were caused by military service. This is because of the unique circumstances of a specific Veteran’s military service. If a presumed condition is diagnosed in a Veteran in a certain group, they can be awarded disability compensation.