…Those findings prompted new guidance on how to improve mask fit at a time of concern over fast-spreading variants of the virus. For optimal protection, the CDC says to make sure the mask fits snugly against your face and to choose a mask with at least two layers… In laboratory testing, researchers simulated coughs and … Continue reading POST 128. February 14, 2021. CORONAVIRUS. “The Centers for Disease Control and Prevention released new research on Wednesday that found wearing a cloth mask over a surgical mask offers more protection against the coronavirus, as does tying knots on the ear loops of surgical masks…