How a nose pierced health care worker can affect the patient?

A healed nostril piercing that is fully healed and taken care of properly posses no threat to patient health on the provision that cross contamination protocols are followed. Which is to say wear a mask when you need to be over a patient for any extended period of time, I.E. dental assistance, nurse etc Healed piercing present no hazard in the work place to patients or anyone else for that matter.