What the COVID-19 variants could mean for masks, lockdowns and vaccines One infectious disease expert suggests doubling up single layer masks could be more effective — when used properly.Dr.
Lynora Saxinger with the University of Alberta cautioned against blindly adding layer upon layer upon layer, saying people should pay attention to how well the mask fits and if there is proper breathability.[ Sign up for our Health IQ newsletter for the latest coronavirus updates ]“We do know that increasing the number of layers of a mask can improve the performance of a mask, at least in lab-type conditions.”“For a lot of people, if they’re used to wearing a very simple and single or double-layer mask, adding extra layers might actually improve the.