Stephen Lewis, Canadian UN envoy charged with combating AIDS in Africa, warned the failure of wealthy countries to respond to an appeal for $200 million US could sabotage plans to provide three million HIV-infected people with drugs by the end of 2005. Lewis, the UN secretary general's special envoy for HIV/AIDS on the continent, said the plan offers "the best chance we've had in more than 20 years to turn the pandemic around" but the abysmal donor response means there isn't money to implement it.