Wearing a neck gaiter may be worse than no mask at all, researchers find. by Allyson Chiu

As the number of novel coronavirus cases continues to rise nationwide, the recurring message from many public health experts and doctors has been simple: Wearing masks saves lives. “We are not defenseless against covid-19,” Robert R. Redfield, director of the Centers for Disease Control and Prevention, said in July. “Cloth face coverings are one of the most powerful weapons we have to slow and stop the spread of the virus – particularly when used universally within a community setting.”

But as face coverings have become increasingly commonplace in American life, so have questions about efficacy — and now a group of researchers from Duke University are aiming to provide some answers. A lifeguard wearing a gaiter-style face covering surveys the water at Hampton Beach in Hampton, N.H., on Aug. 5.

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(Joseph Prezioso/AFP/Getty Images)

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