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.
The Malaria Parasite. There are more than 100 species of malaria parasite. The most deadly â and most common in Africa-is known as Plasmodium falciparum. 1  Once the parasite enters the human body, it lodges itself in the liver where it multiplies approximately 10,000 times.