What's the most powerful tool to protect a child from malaria?

There are many: long-lasting insecticide-treated bednets, rapid diagnostic tests, artemisinin-based combination therapies, and antenatal care for pregnant women. But for World Malaria Day (April 25), there's a tool that's both powerful and simple, the United Against Malaria bracelet--and it's one of the easiest ways to raise funds for malaria control efforts in Africa.