Not all bacteria are harmful. Bacteria can be good and help us in different
ways. An example of bacteria being
helpful is
A. digesting food
B. breathing oxygen
C. forming blood clots

If your job requires you to use a respirator, your employer is required to do three things. what is missing from the list? have you medically evaluated to determine that it is safe for you to wear a respirator train you on how and when to use a respirator