AmericaCoverNewsCOVID-19: Two masks, not one, are 95% effective, says U.S. CDC studyGlobal UpfrontFebruary 11, 2021February 11, 2021 February 11, 2021February 11, 2021 On Feb. 10, the Centers for Disease Control and Prevention released new mask guidelines based on a study of how mask fit affects the wearer’s...Read more