I think it should be used to cover both the nose and mouth . Why I ask ?
Today I went to get some stuff and I did see some people - wearing a mask without covering the nose , some not wearing a mask at all .
Some take off the mask to talk . That made me think , why are they wearing it anyway ?
Well I would say , they just are not serious about it.
What do you think ?
Have you noticed people doing like that at your place/region too ?