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- It is important to note that respirators should adjust tightly to the face of the user, thus avoiding leaks at the borders.
- If there are leaks at the borders then it will be easier to inhale infectious particles.
- The presence of facial hair prevents the proper use of respirators and permits the potential entry of infectious particles.
- Additionally, since different people have different face shapes, there is no single respirator that will fit all people.
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