sentences:  Attaran led a controversial global campaign of over 400 scientists and medical doctors, including several Nobel prize winners, who wanted an exemption to use DDT in public health because it is extremely effective in reducing the deaths of children from malaria.South Africa's Medical Research Council subsequently invited Attaran to draft the public health exemption, which countries agreed at the sixth and last negotiation session in Johannesburg as Annex B of the Stockholm Convention.Although once opposed, Greenpeace and the World Wildlife Fund now accept using DDT in small amounts for public health, and the World Health Organization adopted it as a recommended malaria control strategy.