The United Nations children's and public health agencies may be able to develop and market anti-HIV/AIDS formulations for children within 18 months, the UN Special Envoy helping to coordinate the battle against HIV/AIDS in Africa says. Addressing a conference on AIDS orphans in Africa, Special Envoy Stephen Lewis said the lack of treatment suitable for children was a long-time problem, but the UN Children's Fund (UNICEF) and the World Health Organization (WHO) were now trying to find solutions.