OR staff not scrubbed into a case in the OR wear face masks.  It has no clinical evidence behind it, in fact it has been proven in studies that these masks do nothing to reduce SSI's.  They are a crutch.  A crutch that costs the hospital a lot of money every year.  Hospitals all across Australia, Europe and the UK do not require non scrubbed personnel to wear masks.  In an era where healthcare costs are so high it seems an obvious and easy one to contain.