I ran across this post in the comment section of an 'Amazing Polly' video. I thought it was very interesting and thought you might, also. The person who posted it said they were happy to have the information shared.
https://www.youtube.com/watch?v=avIpEV7p7oo&lc=UgyDAzYNMtTN_J_V0bh4AaABAg.9CYAzJ1OHfo9CYk1uef3og&feature=em-comments&ab_channel=AmazingPolly• Lahme et al., in 2001, wrote that 'surgical face masks worn by patients during regional anaesthesia, did not reduce the concentration of airborne bacteria over the operation field in our study. Thus they are dispensable.'
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