What The Study Did: Researchers performed a series of FFE (fitted filtration efficiency) evaluations for a wide range of 29 respirators and face masks used by health care facilities, including expired N95 respirators, N95 respirators that have undergone sterilization, imported respirators approved by the U.S. Centers for Disease Control and Prevention, respirators not listed as approved, and surgical or procedure masks with ties and ear loops in this quality-improvement study.
Authors: Emily E. Sickbert-Bennett, Ph.D., M.S., of UNC Health Care in Chapel Hill, North Carolina, is the corresponding author.
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