Breathing is the most common way for contaminants to enter the human body. When working in the lab, you should be aware of aerosol-producing procedures such as:
- Accidental spills
- Injections using syringes and needles
- Removing caps and stoppers
- Clean-up procedures, dry sweeping
which introduce contaminants to the air and make them easier to inhale.
Mechanisms to control exposures can be achieved through safe work practices, administrative controls (i.e. substitution of a less hazardous chemical), and personal protective equipment.