"The last decade has seen extraordinary progress with child mortality rates coming down significantly all over the world. Yet 6.9 million children still die each year, most from preventable causes," Raymond Chambers, founder and co-chair of Malaria No More and the U.N. secretary-general's special envoy for malaria, writes in a Forbes opinion piece, published in conjunction with the Skoll World Forum on Social Entrepreneurship. "We have just three years to go to achieve the fourth Millennium Development Goal, which was to reduce deaths of children under five by two-thirds compared to the 1990 numbers -- 12 million annual deaths," he notes, adding, "That means we need to bring that annual number down to four million deaths or less."