Top Infectious Disease Expert Says Double Masking ‘Actually Enhances Your Ability To Get Infected’ Posted on "If you add on another mask, you may actually make it tougher for the air to move through..." An infectious disease expert who served on President Joe Biden’s COVID-19 Advisory Board during the presidential transition says wearing two face masks as a precautionary measure against COVID-19 may actually do more harm than good. Michael Osterholm said on NBC’s “Meet The Press” that double masking could raise the chances of becoming infected with the virus. “When we talk about double masking, remember what we’re really talking about is just trying to prevent the virus from being excreted by me into the air or me inhaling the virus from someone else in the air, and it’s both a function of face fit and face filtration,” Osterholm said.