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Definition
By Mayo Clinic staffMalaria is an infectious disease caused by a parasite that's transmitted by mosquitoes. The illness results in recurrent attacks of chills and fever, and it can be deadly.
Malaria has been virtually eradicated in countries with temperate climates, but it's still prevalent in tropical and subtropical countries in Africa, Asia, the Middle East, South America and Central America. Malaria remains one of the world's leading infectious killers, particularly of children in sub-Saharan Africa.
Most American cases of malaria develop in travelers who have recently returned from parts of the world where malaria is widespread, particularly Africa and India. If you're traveling to malaria-endemic places, take precautions before, during and after your trip. Treatment for malaria is with antimalarial drugs.
