An infectious disease modelor from Fred Hutchinson Cancer Research Center said during Washington Governor Jay Inslee’s press conference on Tuesday that increases in mask use show substantial decreases in COVID-19 virus transmission.  Dr. Joshua Schiffler says masks aren’t perfect, but data does show in places where mask use is increase, the virus reproductive rate drops.  He adds that just because you get the virus even if you wear a face covering, it doesn’t mean the mask doesn’t work, noting it’s possible an illness could have been worse without wearing a mask, and if part of a super spreader event it could have been worse if some people were not wearing a mask.  Schiffler also added there is no evidence masks are harmful in any way.