"Masks" covers various types of respirator (such as N95 or FFP3), and fluid-resistant surgical mask, and surgical masks that are not fluid resistant. We have l

"Masks" covers various types of respirator (such as N95 or FFP3), and fluid-resistant surgical mask, and surgical masks that are not fluid resistant. We have lots of evidence for all of these, and most of that evidence doesn't show any benefit for surgical masks that are not fluid resistant.