Detailed text transcripts for TV channel - BBCNEWS - 20210204:19:43:00
Aerosols could get through. you can see how that happens in these lab tests. they show how air and aerosols can�*t escape from around the masks. they show how air and aerosols can escape from around the masks. so, to guard against that, there are better grades of masks. they�*re called n95 in the us, or ffp2 or ffp3 in the uk. these have a much closer fit. no gaps, which means you should be safer, but they are a lot more expensive. straight to washington. we�*re expecting to hear president...
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