Research on the efficacy of face shields confirms that while they are excellent for blocking large splashes, they are in preventing the spread of airborne pathogens like COVID-19.
The Centers for Disease Control and Prevention (CDC) and other health authorities do not recommend face shields as a primary substitute for cloth face coverings because they lack a peripheral seal. Study: Face Shields Not a Good Mask Substitute
While shields block the initial forward "jet" of a cough or sneeze, smaller aerosolized droplets can easily flow around the sides and bottom of the visor. Research on the efficacy of face shields confirms
Simulations show that high-velocity vortex rings produced by a sneeze can reach the top and bottom edges of a shield in just one second. If a wearer inhales as these particles arrive, they can draw infectious air directly behind the shield. Simulations show that high-velocity vortex rings produced by