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.
In many malaria-endemic countries, malaria transmission does not occur in all parts of the country. Even within tropical and subtropical areas, transmission will not occur.1  At very high altitudes. 2  During colder seasons in some areas.3  In deserts (excluding the oases).n many malaria-endemic countries, malaria transmission does not occur in all parts of the country. Even within tropical and subtropical areas, transmission will not occur. 1  At very high altitudes. 2  During colder seasons in some areas. 3  In deserts (excluding the oases).