Wearing a surgical mask, I get the sense it tends to form more of a seal when inhaling, less when exhaling. (like a valve). If this is common, it would be a point in favour of having the healthy person wear them.
Wearing a surgical mask, I get the sense it tends to form more of a seal when inhaling, less when exhaling. (like a valve). If this is common, it would be a point in favour of having the healthy person wear them.