Mask Substitute | Study: Face Shields Not A Good

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.

Studies published in journals like Physics of Fluids highlight several critical reasons why face shields fail as standalone protection: Study: Face Shields Not a Good Mask Substitute

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. While shields block the initial forward "jet" of