Face shields, when used in conjunction with face masks, can help reduce the spread of COVID-19.
A face shield is primarily used for eye protection for the person wearing it. They prevent droplets from coming in contact with the face. Face shield wearers should wash their hands before and after removing the face shield and avoid touching their eyes, nose and mouth when removing it.
To get the most benefit from your face shield, always use it in conjuction with a face mask, make sure it fits properly, disinfect after every use.
You can never have too many safety measures against COVID-19.