Plexiglass, polycarbonate and acrylic barriers are often in place in stores, restaurants, and classrooms to protect against the corona virus. Researchers from Washington University (St. Louis)found that they may provide good protection against a direct emission of the virus, however, during regular breathing, viral particles or carrier droplets are small enough to follow the airflow and go around the shield.

The research suggests that people continue to wear face masks, including those environments where plexiglass barriers are in place