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Neville Hodgkinson makes a slight error in his comment on my review of his book on Aids (THES, December ). When the piece was published (though not when it was written), I had already ceased to be a Wellcome Fellow, and become simply lecturer in science communication, as correctly stated. Curiously, given the rather tortuous chain of cause and effect he implies, this did not improve my opinion of the book.

Jon Turney Department of science and technology studies, University College London