Definition - What does Acute Exposure mean?
Acute exposure refers to a single exposure (not lasting longer than a day) to a substance(s) that causes severe harm, or even death. This type of exposure differs from chronic exposure, which occurs over a long period of time, and negative health effects are cumulative.
Safeopedia explains Acute Exposure
The Environmental Protection Agency (EPA) provides acute exposure levels for many chemicals in the form of acute exposure guideline levels. While acute exposure tends to create immediate health effects, these effects are more likely to be reversible than those associated with chronic exposure to dangerous substances.