..."Melinda told you about some of the people we met in Tanzania recently," says Bill Gates. "I was impressed by a man named Prosper Chaki, who runs a larviciding project in Dar es Salaam." Gates continues his speech and recalls what Prosper Chaki, an entomologist at Ifakara Health Institute, has had told him in June 2 011: "Mosquitoes are smart.... We must be smarter."