Which type of exposure refers to a long-term or recurring dose?

Chronic exposure refers to a long-term or recurring dose of a substance over an extended period. This type of exposure typically involves low levels of a hazard that may not immediately manifest symptoms or health issues but can lead to significant health effects over time, such as the development of diseases or conditions related to prolonged exposure.

In contrast, continuous exposure implies a constant or uninterrupted exposure to a substance, which may not necessarily relate to the duration of the effects or the frequency of exposure. Acute exposure involves a single or short-term exposure to a substance that could lead to immediate effects, while flash exposure suggests a very brief or instantaneous contact with a hazardous material, which also does not fit the criteria of long-term exposure. Understanding these distinctions is important for evaluating health risks associated with various types of environmental exposures.