https://twitter.com/maosbot/status/1652054592824147970
I wear a 3M Aura when I lecture, as I feel that the flat central portion makes me easier to hear. I expect I'll be wearing a mask when lecturing for the rest of my life pic.twitter.com/DuGIAvm6T4
— Michael A Osborne (@maosbot) April 28, 2023
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