The observed or calculated probability of the occurrence of an event, Xâe.g., toxic exposure, infection, etc.âin a population relative to its exposure to a specific hazard or pathogen. Absolute risk is risk stated without any context whatsoever.
Malaria is a serious infection. It is common in tropical countries such as parts of Africa, Asia and South America. Malaria is a disease caused by a parasite called Plasmodium that lives in mosquitoes.
How Common Is Malaria? Forty percent of the world's population is at risk for contracting malaria from infected mosquitoes, primarily in tropical and subtropical regions. Worldwide, there are 300 to 500 million cases of malaria and more than one million deaths from malaria each year.