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Dr Anthony Fauci, President Biden’s chief medical adviser on COVID-19, said two face masks are likely more effective than one against the novel coronavirus, despite significant uncertainty on the matter.
“If you have a physical coating with one layer you put on another, it makes sense that that’s probably more effective,” Fauci told NBC News on Monday.
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Infectious disease experts from Stanford Health Care, Mayo Clinic and Johns Hopkins University recently told Fox News that there was little to no evidence on the matter.
Neysa Ernst of Johns Hopkins University, where she serves as the nurse manager of the biocontainment unit, agreed, although she proposed that anecdotal evidence suggests that additional layers could provide “psychological safety” to some.
“In this pandemic, psychological safety is important, it provides a feeling of control in an unfamiliar environment,” Ernst wrote.
According to the Centers for Disease Control and Prevention (CDC), masks should have two layers of breathable fabric, with a tight fit covering the nose and mouth.
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There is conflicting advice on double-masking, which suggests that there isn’t enough research behind it yet. When worn correctly, a single face mask made of “the right material” usually provides sufficient protection, said Paula Cannon, a distinguished professor of molecular microbiology and immunology at the Keck School of Medicine at the University of Southern California (USC), in an email. .
“However, wearing two can provide extra protection. A second mask can create a tighter seal around your face and help secure the masks so they don’t slip off,” she added.
Another doctor, Dr Dave Hnida, previously told CBS that two masks can create more of an “obstacle course” for viral particles in an attempt to travel through the air, through the body and into the lungs.
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