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First dengue vaccine trial disappoints

Shots protect against three virus subtypes, but not fourth

12:02pm, September 12, 2012

The first large-scale test of a vaccine against dengue fever has failed to consistently prevent the viral disease in children, researchers report online September 11 in the Lancet. The mixed results have left scientists wondering how one form of the virus dodged what looked like a potent immunization regimen.

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