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VOA \u2014 The U.S. Centers for Disease Control and Prevention now says wearing two masks offers more protection against COVID-19 than one mask.<\/p>\nVOA \u2014 The U.S. Centers for Disease Control and Prevention now says wearing two masks offers more protection against COVID-19 than one mask.<\/p>\n
In an experiment using artificial heads spaced 6 feet apart, the CDC said one mask, either surgical or cloth, blocked about 40% of coronavirus-sized particles, but a cloth mask worn on top of a surgical mask blocked 80%.<\/p>\n
However, the study only used one kind of surgical mask and one type of cloth, making it unclear if the same results would be achieved with different materials.<\/p>\n
Information about masks has changed over the course of the pandemic. At the outset, health officials told Americans not to wear masks, including a year-old tweet from then-Surgeon General Jerome Adams saying, \u201cSeriously people – STOP BUYING MASKS!\u201d<\/p>\n
In March, Dr. Anthony Fauci said there was \u201cno reason\u201d to wear masks, though he changed course a short time later.<\/p>\n
Later, health officials recommended masks when social distancing could not be maintained. That later changed to recommending wearing masks while in public.<\/p>\n