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Si nous ne savons pas encore quel niveau exact de contamination présente le plus grand risque d’infection, “l’exposition est fonction de la concentration et du temps,” dit Joseph G. Allen, directeur du Harvard Healthy Buildings, et expert en santé environnementale. Source: La ventilation, essentielle à la réouverture des salles de classe – The New York Times
Scientists who initially warned about contaminated surfaces now say that the virus spreads primarily through inhaled droplets, and that there is little to no evidence that deep cleaning mitigates the threat indoors. People buying disinfectant at a shopping mall in Hong Kong. Credit…Lam Yik Fei for The New York Times Published Nov. 18, 2020Updated Nov. 19, 2020, 4:33 a.m. ET HONG KONG — At Hong Kong’s deserted airport, cleaning crews constantly spray baggage trolleys, elevator buttons and check-in counters with antimicrobial solutions. In New York City, workers continually disinfect surfaces on buses and subways. In London, many pubs spent lots of… Lire la suite »Why Disinfection Isn’t the Way to Stop the Coronavirus | The New York Times
“Il est devenu clair que les masques en tissu, même s’ils ne sont pas aussi efficaces que les FFP2, permettent quand même de réduire la transmission”, dit Linsey Marr, une experte en aérosolisation à l’université Virginia Tech. “Même si vous n’atteignez pas une réduction de 95%, c’est toujours mieux que rien”. Source: Les masques, ça marche. Vraiment. On va vous montrer comment. – The New York Times
“It’s become clear that cloth masks, even though they’re not as effective as the N95s, are still effective at reducing transmission,” said Linsey Marr, an aerosol expert at Virginia Tech. “Even if you’re not achieving that 95 percent reduction, something is better than nothing.” Source: Masks Work. Really. We’ll Show You How. – The New York Times
Europe’s latest wave of restrictions to stop the spread of coronavirus have largely avoided closing schools. We take a look at why and how they are being kept open. Source: Schools Stay Open in Europe’s New Lockdowns, a Reversal From Spring – The New York Times