Does My Mask Protect Me if Nobody Else Is Wearing One?

There is also plenty of evidence showing that masks protect the wearer even when others around them are mask-free. The amount of protection depends on the quality of the mask and how well it fits. During a hotel outbreak in Switzerland, for instance, several employees and a guest who tested positive for the coronavirus were wearing only face shields (with no masks); those who wore masks were not infected. And a Tennessee study found that communities with mask mandates had lower hospitalization rates than areas where masks weren’t required.