Eradication of malaria is made more difficult by: mosquito resistance to insecticides; political instability in countries with malaria; lack of funding for malaria eradication programmes. Malaria has been eliminated from most of Europe, North America, Australia, North Africa and the Caribbean, and parts of South America, Asia and Southern Africa. Each elimination is a step in the process of eradication. One of the things causing malaria in humans is "P. knowlesi". This parasite makes eradication more complicated. "knowlesi" makes eradication more complicated because "knowlesi"s transmission is different. "knowlesi"s transmission is mostly zoonotic. ("Zoonotic" means that in order to eradicate "Plasmodium knowlesi" we would need to kill all the animals that have it.)