Introduction to Health Risk Assessment
People face all kinds of risks everyday, some voluntarily and others involuntarily. Therefore, risk plays a very important role in world. Studies on cancer caused a turning point in the world of risk because it opened the eyes of risk scientists and health professionals to the world of health risk assessments (HRA). HRAs provide an orderly, explicit, and consistent way to deal with issues in evaluating whether a health problem exists and what the magnitude of the problem may be. Health problem identification is the most easily recognized of the actions required of risk managers or regulatory agencies. A risk estimate indicates the likelihood of occurrence of the different types of health or environmental effects in exposed populations. The usual objective of HRA and the accompanying calculations is to evaluate the potential for adverse health effects from the release of chemicals into the environment.