Double-Masking Offers More Protection Against COVID-19

The Centers for Disease Control and Prevention released new research on FEbruary 10, 2021 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. 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 breathing and tested how well...