The phrase refers to how much contact a person has with chemical substances, either through direct contact or by being exposed to them in the environment. Full definition
It would take a colossal amount of exposure to the chemicals in a nail salon to run the risk of harming your baby. (babygaga.com)
Should you be concerned about the high level of exposure to this chemical? (fitnesswayne.com)
Now am I saying that if a baby wears a disposable diaper he or she will inevitably contract some terrible disease from exposure to the chemicals in diapers? (thirstiesbaby.com)