Face shields can help reduce the spread of COVID-19 The primary mechanism of transmission of COVID appears to be via droplets Face shields are excellent at preventing droplets from coming into contact with the nose, mouth, and eyes, which are the body sites that the virus enters to establish infection F ace coverings, regular hand washing, physical distancing, and staying home as much as possible are very good tools. Add a face shield to all of those requisite practices and you go from ‘good’ to ‘great'.