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The Centers for Disease Control and Prevention (CDC) updated their mask guidelines on Wednesday to include data from a recent lab experiment that found the placement of a fabric mask over a surgical mask, as well as the use of a properly fitted mask was effective in stopping the spread of the coronavirus.
The update, which was announced by CDC director Dr Rochelle Walensky during a White House coronavirus briefing, comes after a lab experiment using mock breaths revealed that the placement from a cloth mask over a medical procedure mask or the use of a medical procedure mask with earrings tied and folded over to the sides, reduces exposure to potentially infectious aerosols by approximately 95%.
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The new guide advises you to follow two important steps, namely to make sure that the mask fits perfectly on the face and to choose a mask with layers to “keep your respiratory droplets in and out of others”. Additionally, the CDC advises using a mask with a nasal wire, using a mask adjuster or splint to improve the fit, and checking that there is no space where air can. circulate.
However, at this time, the agency advises against using two disposable masks because they are “not designed to be a good fit and wearing more than one will not improve the fit.” It also advises against combining a KN95 mask with another mask.
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“The bottom line is this, masks work and they work best when they are properly fitted and worn correctly,” Walensky said.
The CDC had announced several weeks ago that it was investigating whether using two masks was effective in stopping the spread of the coronavirus after Dr Anthony Fauci, the country’s leading infectious disease expert, said it “was logic”.
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The agency was waiting to see “hard data” before making any adjustments, CDC chief medical officer Dr John Brooks told COVID-19 response at an Infectious Diseases Society briefing of America held at the end of last month.
“We want to present all the options that are available to people,” he said at the time. “If we can hide the rules, this is the first important step.”
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