| Amid the threat of more-contagious variants of the virus, federal health officials are urging Americans to protect themselves by making sure their masks fit properly and, for the first time, proposing double masking as one approach. Two methods substantially boost fit and protection, according to a new report from the Centers for Disease Control and Prevention. One is wearing a cloth mask over a surgical mask. The second is improving the fit of a surgical mask by knotting the ear loops and tucking in the sides close to the face to prevent air from leaking out around the edges. | 
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