April's issue tangled with quantum braids in "Computing with Quantum Knots," by Graham P. Collins. Readers also learned about new vaccines coming to market that promise to conquer childhood diarrhea caused by rotavirus, a frequent killer of young children in the developing world, in "New Hope for Defeating Rotavirus," by Roger I. Glass.
Most interesting were reader responses to another health problem, depicted by Madhusree Mukerjee, about public health scientist Smarajit Jana's work in organizing sex workers to fight HIV in India ["The Prostitutes' Union," Insights]. Some letters demonstrated that there are those who prefer to draw a sharply defined line between science and medicine, culture and politics--an impossible luxury when scientific knowledge is applied to ameliorating human ills. Robert L. Teeter e-mailed: "Do you really think that articles on prostitution are appropriate for what used to be a dignified and respected scientific magazine?" More opinions were closer to Andy Benton's, who wrote from Flourtown, Pa.: "Thank you for sharing Jana's story. He is truly a hero of our times."