Read part one of Zeke Emanuel's Africa Diaries here. About six hours after leaving Dakar, Senegal’s capital, we arrive in Kissan, a village of 526 people that lies in the Tambacounda Region. We left paved road about 30 miles ago. After bouncing on rutted, puddle-filled paths through the bush, we enter a collection of one-room huts made of cinder blocks with thatched roofs. Chickens, ducks, and goats roam the reddish-orange mud alleyways. Kissan is one of the hot spots for malaria, a deadly disease that mosquitoes carry and that killed 900,000 people last year alone.