Long-term exposure

Chronic exposure Long-term repeated exposure to low levels of pollutants, which may cause damage to the health of occupants. 

Initial Exposure Long-term Plasma Levels Acute Allergic Response... 

Duration includes lifetime exposure long-term includes lifetime exposure, short-term includes only less-than-lifetime exposure... 

Compound Short-Term Exposure Long-Term Exposure Oral RfD (mg/kg) ... 

Chronic means long-term or prolonged. It can describe either an exposure or a health effect. A chronic exposure is a long-term exposure. Long-term means lasting for months or for years. 

Chronic exposure Long-term exposure at a rate at which the body cannot get rid of the toxic substance. ... 

It stands to reason that consideration of response characteristics that have been generated for protection of military combatants against chemical warfare agents can be extended to protection of Chemical Weapons Convention inspectors against exposure to toxic chemicals. An inspector must be protected from both chronic exposures (long term, low concentrations) and acute exposures (short term, higher concentrations). Because of the fact that the inspector has a large number of important tasks to accomplish, the detector or safety device should be of such a size that the device would not be an encumbrance to the inspector. 

Romano AG, Harvey JA. 1998. Prenatal cocaine exposure Long-term deficits in learning and motor performance. Ann N Y Acad Sci 846 89-108. 

A2. One commonly used type of risk evaluation is that of the increment in probability that an individual will suffer a fatal injury or illness as a result of radiation exposure (the increment in individual health risk). However, an evaluation of the consequences of a potential major accident at a nuclear installation may have to consider types of harmful effects other than just increments in individual health risks. Such effects may include the potential total number of fatalities or injuries attributable to radiation exposure, long term restrictions on land use, disnqition of normal life, damage to the installation and other property, and loss of production. These, collectively, may be referred to as societal risk. 

---