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In a message dated 14/07/96 22:46:01, Jon Rodgers writes: >If the answer is zero, then I would agree! The answer is not zero, we have had a true positive in the last five years. Having said that there are some false positives that require investigation. We would be better off chasing the HepB positives rather than the WR's. Trefor Roscoe [log in to unmask] %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%