6 opiniões sobre “E A Dualidade Mesmo Entre Situações Em Escolas Diferentes?”
Estavam de máscara mas era a dos pobres. O jurista tossiu e foi tudo a correr testar-se. Daí vem o provérbio “Não irei à RGP, nem que a vaca tussa!”
Abstract
Face masks are recommended to reduce community transmission of SARS CoV 2. One of the primary benefits of face masks and other coverings is as source control devices to reduce the expulsion of respiratory aerosols during coughing, breathing, and speaking. Face shields have been proposed as an alternative to face masks, but information about face shields as source control devices is limited. We used a cough aerosol simulator with a headform to propel small aerosol particles (0 to 7 μm) into different face coverings. An N95 respirator blocked 99% of the cough aerosol, a procedure mask blocked 59%, a 3-ply cloth face mask blocked 51%, and a polyester neck gaiter blocked 47% as a single layer and 60% when folded into a double layer. In contrast, the face shield blocked 2% of the cough aerosol. Our results suggest that face masks and neck gaiters are preferable to face shields as source control devices for cough aerosols.
O Meu Quintal 
Estavam de máscara mas era a dos pobres. O jurista tossiu e foi tudo a correr testar-se. Daí vem o provérbio “Não irei à RGP, nem que a vaca tussa!”
Abstract
Face masks are recommended to reduce community transmission of SARS CoV 2. One of the primary benefits of face masks and other coverings is as source control devices to reduce the expulsion of respiratory aerosols during coughing, breathing, and speaking. Face shields have been proposed as an alternative to face masks, but information about face shields as source control devices is limited. We used a cough aerosol simulator with a headform to propel small aerosol particles (0 to 7 μm) into different face coverings. An N95 respirator blocked 99% of the cough aerosol, a procedure mask blocked 59%, a 3-ply cloth face mask blocked 51%, and a polyester neck gaiter blocked 47% as a single layer and 60% when folded into a double layer. In contrast, the face shield blocked 2% of the cough aerosol. Our results suggest that face masks and neck gaiters are preferable to face shields as source control devices for cough aerosols.
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Falso! Ninguém correu para o teste. Os funcionários da fundação Champalimaud foram à casa dos conselheiros.
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“Les uns et les autres” – Do princípio ao fim! – Sempre!
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Há quem resuma e diga que é a modos de ” chutar com o pé que temos mais à mão “. É assim ou assado !
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É mesmo assim ou assado, é o oito e o oitenta.
Grata, Guinote, pela tua partilha! Estou numa preocupação do caraças… rssssssss
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