Researchers found that if two people are both wearing surgical masks that are knotted and tucked flush to the face — or if both are wearing a cloth mask over a surgical mask — exposure to viral particles is cut by more than 95%.
Researchers found that if two people are both wearing surgical masks that are knotted and tucked flush to the face — or if both are wearing a cloth mask over a surgical mask — exposure to viral particles is cut by more than 95%.
