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Nature 449, 24 (6 September 2007) | doi:10.1038/449024c; Published online 5 September 2007

Diverse approaches useful for microbicide trials

Salim S. Abdool Karim1 & Quarraisha Abdool Karim1

  1. CAPRISA, Doris Duke Medical Research Institute, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa

Your News story 'HIV trial doomed by design, say critics' (Nature 448, 110–111; 2007), portrays a biased and excessively pessimistic view of the Centre for the AIDS Programme of Research in South Africa (CAPRISA) 004 trial. As the first microbicide trial to be initiated from, and partially funded by, South Africa, the CAPRISA 004 trial promises to address some fundamental questions about the safety and effectiveness of tenofovir as a microbicide gel.

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