Wearing two masks will provide more protection against COVID-19, Boise doctor says - KTVB.com
“Just to give you some flavor, a regular double layer fabric mask probably protects about 70% of the time or protects against 70% of the virus,†said Dr.An average surgical mask provides roughly 80% protection from the virus, according to McGeorge.A surgical mask worn underneath a fabric mask, however, will provide roughly 90% protection.
"This provides additional protection against the virus and that additional mask actually helps your first mask fit more snuggly,†she said.Some publications describe KF-94 masks as a mix between an N-95 mask and a cloth mask.