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Malaria is one of the leading killers among infectious diseases, with no effective vaccine Malaria is particularly devastating to young children and travelers with no acquired immunity.
Malaria is one of the leading killers among infectious diseases, although basically eradicated in countries with moderate climates it is still all too common in tropical and subtropical countries.
Malaria is usually contracted from a mosquito carrying a plasmodium, a one-celled parasite. There are approximately 170 species of plasmodium but only four cause malaria in humans, P. falciparum, P. vivax, P. malariae, and P. ovale. It can also be transmitted from a pregnant mother to her unborn child and through blood transfusions.