Introduction to Health Risk Assessment
There are ll1any definitions of the word risk. It is a combination of uncertainty and damage; a ratio of hazards to safeguards; a triplet combination of event, probability, and consequences; or even a measure of economic loss or hwnan injury in tenus of both the incident likelihood and the magnitude of the loss or injury (AIChE, 1989). People face all kinds of risks everyday, some voluntarily and others involuntarily. Therefore, risk plays a very important role in today's world. Studies on cancer caused a turning point in the world of risk because it opened tlle eyes of risk scientists and health professionals to tlle world of risk asseSSInents.