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According to a New York Times article published on September 22 2020, “Plastic face shields do little to contain the spread of microscopic airborne particles created by such activities as talking, singing or sneezing, according to recent research from Japan that modeled the diffusion of respiratory aerosols on the world’s fastest supercomputer.

The shields, which have been marketed as an alternative to face masks to guard against the coronavirus, do almost nothing to stop the spread of microscopic airborne droplets that are increasingly understood to be a major vector for spreading the disease, according to a recent study by researchers at the Riken Center for Computational Science, a research institute based in Kobe, Japan.”

See full article here.