Walk along one of the many streams and rivers in the West Nile region of Uganda, and you'll notice something funny. All along the riverbanks, you'll see small pieces of blue cloth, attached to wooden stakes in the ground. There's one every 50 yards or so.
No, this isn't some half-baked public art project. These dinky contraptions are actually flytraps, designed to lure and kill tsetse flies, whose bites transmit a parasitic disease called sleeping sickness, which, like rabies, drives victims mad before it kills them.