Esophagus is not affected by malaria. You can get drug induced gastritis and then reflux esophagitis.
Japan is a country that is most affected by them
Mosquitoes are not infected with malaria until they bite someone with the disease. The mosquito is then infected with a parasite and goes on to infect others. Malaria is prevalent in tropical and sub tropical areas and is a major cause of death in third world countries.
Japan is a country that is most affected by them
Spleen
liver
Most countries are not, but some are.
Malaria is most present throughout swampy, tropical areas, in which developing countries just happen to be a part of. Another reason is because wealthy countries have mainly kept the spread of malaria under control, virtually eliminating the disease within the nation (this is the same for other diseases, such as measles).
liver
spleen & liver
You won't catch malaria in Britain because we don't have mosquitos but British people can be affected by it if they have been to a country where it can be caught.
Peru is affected by malaria. It is very difficult task to tackle malaria in tropical rain forest area. Unless and until the whole world unite as one nation, so many things are not possible.