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A paper in Nature shows that herbicides can attack the parasite that causes the tropical disease toxoplasmosis. Kerri Smith explores the history of wielding weedkiller against human disease.
In the first of a series of articles covering nuclear issues, Declan Butler looks at the nuclear non-proliferation treaty and finds that there has never been a better climate for negotiation.
Late last week, a UK-based company reported promising safety data for a 'universal' flu vaccine. Heidi Ledford looks at how such vaccines work, and what challenges must still be overcome.