Nearly half of all N95 masks worn by anesthesiologists during the COVID–19 pandemic fail fit tests after four days of reuse, according to an analysis published on June 26 by the British Journal of Anaesthesia (doi.org/ 10.1016/ j.bja.2020.06.023).
The results, based on assessments performed on 74 anesthesia providers at Washington University School of Medicine in St. Louis (WUSTL) in April and May, suggest that many of the masks being worn by health care professionals during the height of