A nuclear pharmacy preparation room classified as Class C, do the workers
need face masks all the time they are in the room or only when performing
specific aseptic tasks ?
I have trouble understanding the guides especially USP chapter 797 and
the Emea Annex 1. Annex 1 suggests that in Class C a face mask is not
USP 797 is unclear to me in its recommendations on face masks.
Thanks for any help.
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