What is the most common route of exposure to carbon monoxide?

The most common route of exposure to carbon monoxide is through inhalation. Carbon monoxide (CO) is a colorless, odorless gas produced during the incomplete combustion of fossil fuels. This makes it prevalent in environments where fuel-burning appliances are used, such as in homes with gas stoves, heaters, and vehicles running in enclosed spaces.

When individuals are exposed to carbon monoxide, they inhale the gas directly into their lungs, where it enters the bloodstream and binds with hemoglobin more effectively than oxygen. This interference with oxygen transport can lead to hypoxia and other serious health effects.

Other routes of exposure, such as injection, absorption through the skin, or ingestion, are not typical for carbon monoxide since it is not a substance that is administered or absorbed in these ways under normal circumstances. Carbon monoxide poses the highest risk to health through inhalation due to its sources and the way it interacts with the body when breathed in.