The malaria-blocking bug, Microsporidia MB, was discovered by studying mosquitoes on the shores of Lake Victoria in Kenya. An estimated 50% of the world’s population, about 3.3 billion people, is at risk for Malaria. The following areas are most commonly affected by malaria: Africa, India, Pakistan, Southeast Asia, Paupa New Guinea, Haiti, and parts of South America. Malaria is spread when an infected Anopheles mosquito bites a person. Malaria is a serious disease which occurs almost exclusively in the tropics and subtropics.Malaria is an infectious disease caused by a parasite, called Plasmodium that invades red blood cells and liver cells. The infection can result from any one of five parasites from the Plasmodium falciparum (or P. falciparum), Plasmodium malariae (or P. malariae), Plasmodium vivax (or P. vivax), Plasmodium ovale (or P. ovale), Plasmodium knowlesi (or P. knowlesi). Malaria is a disease caused by a parasite. An estimated 50% of the world’s population, about 3.3 billion people, is at risk for Malaria. The following areas are most commonly affected by malaria: Africa, India, Pakistan, Southeast Asia, Paupa New Guinea, Haiti, and parts of South America.