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Response to Ron Kathren's question about my comments on Plutonium toxicity



	Where did I say that Pu is not highly toxic? I said that we can 
expect one cancer for every 200 micrograms inhaled by people (assuming 
linear-no threshold). This was from my paper in Health Physics 32: 
359-379; 1977. If you have reason to question that number, please let me 
know why. For acute effects (fibrosis), my paper gives about 1 mg as the 
lethal dose.

Bernard L. Cohen
Physics Dept.
University of Pittsburgh
Pittsburgh, PA 15260
Tel: (412)624-9245
Fax: (412)624-9163
e-mail: blc+@pitt.edu