Double-masking does not improve protection against coronavirus, suggests Study

Double masking with improperly fitted masks may "not significantly improve mask efficiency and produces a false sense of security", suggests the study published in Physics of Fluids.

Researchers at Florida State University and Johns Hopkins University argued, "More layers mean a less porous face covering, leading to more flow forced out of the perimeter gaps (sides, top, and bottom) in masks with a less secure fit."

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