Masks hinder not only lip-readers, but also people who do not lipread.
from WebMD Healthhttps://img.webmd.com/dtmcms/live/webmd/consumer_assets/site_images/article_thumbnails/news/2020/07_2020/clear_mask/1800x1200_clear_mask.jpg https://ift.tt/30FgF1h
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