The face shields, which are made for industrial settings, are typically used by hospital staff, who use them in conjunction with surgical or N-95 masks. According to a study done in 2014 found in the Journal of Occupational and Environmental Hygiene, called the “Efficacy of Face Shields Against Cough Aerosol Droplets From a Cough Simulator,” a simulation showed that wearing a plastic face shield reduced the inhalation of droplets from a cough by 96%, significantly protecting the wearer. The study also showed that “face shields can substantially reduce the short-term exposure of health care workers to large infectious” particles. However, the researchers in the study pointed out that face shields “cannot be used as a substitute for respiratory protection when it is needed.”
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