Malaria occurs in many locations of the tropical world and in some locations of the subtropics.
Malaria is very common in SubSaharan Africa. The predominant species is Plasmodium falciparum . Plasmodium falciparum is the most dangerous of the four species of human malaria. Malaria causes an estimated 2.7 million deaths per year, with most of these deaths occurring in Africa. Ninety percent of the world's malaria cases occur in Africa.