QUESTION where did malaria come from? ANSWER Malaria is a disease caused by a single-celled parasite called Plasmodium. There are many species of Plasmodium, which infect many other animals as well as humans. The types of malaria which infect humans probably evolved from similar Plasmodium species in monkeys and apes; for example, P. vivax is closely related to several species of malaria … [Read more...]