Malaria is an insect-borne disease caused by the infection of Plasmodium by the bite of an Anopheles or the blood of a person with Plasmodium. There are four types of Plasmodium parasitic in humans, namely Plasmodium vivax, Plasmodium falciparum, Plasmodium falciparum and Plasmodium ovale. In China, it is mainly Plasmodium vivax and Plasmodium falciparum; the other two are rare, and some cases have been imported from abroad in recent years. Different malaria parasites cause vivax malaria, three-day malaria, falciparum malaria and oval malaria. The main manifestations of this disease are periodic regular attacks, body chills, fever, and sweating. After long-term multiple attacks, it can cause anemia and splenomegaly.
On October 27, 2017, the World Health Organization's International Agency for Research on Cancer published a preliminary list of carcinogens, malaria (caused by Plasmodium falciparum infection in highly endemic areas) in the list of Class 2A carcinogens.