{"id":27951,"date":"2020-11-17T15:53:24","date_gmt":"2020-11-17T15:53:24","guid":{"rendered":"https:\/\/horecamagazine.be\/restaurants-hyper-contaminants-non-letude-ne-le-prouve-pas\/"},"modified":"2020-11-18T14:39:29","modified_gmt":"2020-11-18T14:39:29","slug":"restaurants-hyper-contaminants-non-letude-ne-le-prouve-pas","status":"publish","type":"post","link":"https:\/\/horecamagazine.be\/fr\/restaurants-hyper-contaminants-non-letude-ne-le-prouve-pas\/","title":{"rendered":"Les restaurants dangereux ? Non l\u2019\u00e9tude ne le prouve pas"},"content":{"rendered":"<p>[et_pb_section fb_built=\u00a0\u00bb1&Prime; _builder_version=\u00a0\u00bb4.4.7&Prime;][et_pb_row _builder_version=\u00a0\u00bb4.4.7&Prime; width=\u00a0\u00bb900px\u00a0\u00bb][et_pb_column type=\u00a0\u00bb4_4&Prime; _builder_version=\u00a0\u00bb4.4.7&Prime;][et_pb_text _builder_version=\u00a0\u00bb4.4.7&Prime; link_font=\u00a0\u00bb||||on||||\u00a0\u00bb link_text_color=\u00a0\u00bb#0C71C3&Prime;]<\/p>\n<p><span>Le fameux article<\/span>\u00a0publi\u00e9 le 10 novembre dans la revue Nature (1) et r\u00e9cemment relay\u00e9 par de nombreux m\u00e9dia m\u00e9rite d\u2019\u00eatre lu attentivement\u2026 et contrairement \u00e0 ce qui a \u00e9t\u00e9 dit ne permet pas de conclure avec certitude que les restaurants seraient des endroits hyper contaminants\u00a0!<\/p>\n<p>Certains points de la m\u00e9thode utilis\u00e9e ainsi que les conclusions sont d\u2019ailleurs remis en question par plusieurs scientifiques qui sugg\u00e8rent aux auteurs de ne pas encore publier leur \u00e9tude dans la c\u00e9l\u00e8bre revue avant de l\u2019avoir affin\u00e9e. Comme nous le verrons ci-dessous, les conclusions des auteurs eux-m\u00eames sont largement nuanc\u00e9es.<\/p>\n<p>En conclure et afficher en gros titre de mani\u00e8re lapidaire\u00a0que les restaurants seraient des endroits hyper contaminants est aller vite en besogne et t\u00e9moigne d\u2019un dangereux manque d\u2019esprit critique \u2026<\/p>\n<h4><strong>Objet de l\u2019\u00e9tude\u00a0:<\/strong><\/h4>\n<p>Les auteurs de l\u2019\u00e9tude, Serina Chang et ses collaborateurs, ont analys\u00e9 un ensemble de donn\u00e9es fournies par la t\u00e9l\u00e9phonie mobile dans le but d\u2019\u00e9tudier l\u2019impact de la mobilit\u00e9 sur la transmission du virus.<\/p>\n<p>Afin d\u2019analyser les d\u00e9placements des personnes depuis leur lieu de r\u00e9sidence vers des lieux non r\u00e9sidentiels tels que les magasins, les restaurants et les lieux de culte, ils ont mod\u00e9lis\u00e9 les d\u00e9placements de 98\u00a0millions de personnes dans 10 grandes m\u00e9tropoles des \u00c9tats-Unis, du 1er\u00a0mars au 1er\u00a0mai\u00a02020. (2)<\/p>\n<h4><strong>Limitations\u00a0:<\/strong><\/h4>\n<p><strong>Selon les auteurs eux-m\u00eames<\/strong> (3), l\u2019\u00e9tude contient de nombreuses limitations en ce qu\u2019elle se base uniquement sur les donn\u00e9es g\u00e9olocalis\u00e9es des t\u00e9l\u00e9phones portables.<\/p>\n<h4>Ce qui signifie que\u00a0:<\/h4>\n<ul>\n<li>Les donn\u00e9es obtenues ne couvrent qu\u2019une partie de la population : celle qui dispose d\u2019un t\u00e9l\u00e9phone portable. Leur analyse ne tient pas compte de toute une partie de la population telle que les \u00e9coles, les enfants de moins de 13 ans, les h\u00f4pitaux, les prisons, ou tout simplement les personnes qui ne disposent pas d\u2019un t\u00e9l\u00e9phone \u2026<\/li>\n<li>les donn\u00e9es ne couvrent que les endroits o\u00f9 le r\u00e9seau mobile est fonctionnel<\/li>\n<li>l\u2019\u00e9tude ne comprend pas des caract\u00e9ristiques pertinentes telles que la transmission asymptomatique ; la variation de la taille des m\u00e9nages ; les d\u00e9placements entre les r\u00e9gions m\u00e9tropolitaines ; les diff\u00e9rences de sensibilit\u00e9 des personnes en raison de conditions pr\u00e9existantes ou de l\u2019acc\u00e8s aux soins ; les variations li\u00e9es \u00e0 l\u2019\u00e2ge etc.<\/li>\n<li><strong>l\u2019\u00e9tude ne tient pas compte de l\u2019influence des divers comportements r\u00e9ducteurs de transmission comme le respect des mesures de protection sanitaire telles que se laver les mains, porter un masque etc. ou de certains facteurs propres \u00e0 l\u2019endroit tels que la ventilation des lieux<\/strong><\/li>\n<\/ul>\n<p>En conclusion, les auteurs eux-m\u00eames mettent le lecteur en garde contre une interpr\u00e9tation trop \u00e9troite ou limitative de ces donn\u00e9es\u2026<\/p>\n<h4><strong>R\u00e9sultats contradictoires\u00a0:<\/strong><\/h4>\n<p>Ailleurs les auteurs reconnaissent m\u00eame que le r\u00e9sultat est contradictoire selon que l\u2019on consid\u00e8re\u00a0comme facteur de contamination\u00a0:<\/p>\n<ul>\n<li>A la fois la densit\u00e9 de personnes ET le temps pass\u00e9 dans un endroit<\/li>\n<li>La densit\u00e9 de personnes seulement<\/li>\n<li>Le temps pass\u00e9 dans un endroit seulement<\/li>\n<\/ul>\n<p>Les restaurants semblent particuli\u00e8rement contaminants dans l\u2019hypoth\u00e8se o\u00f9 \u00e0 la fois la densit\u00e9 et le temps pass\u00e9 dans un endroit seraient d\u00e9terminants.<\/p>\n<p><strong>Par contre, dans le mod\u00e8le \u00e9valuant uniquement l\u2019impact du temps o\u00f9 l\u2019on est rest\u00e9 dans un endroit, en supprimant le facteur densit\u00e9, les restaurants n\u2019apparaissent plus que faiblement contaminants.<\/strong>.. \u00a0Que faut-il en conclure pour les restaurants o\u00f9 la distanciation sociale est respect\u00e9e\u00a0??<\/p>\n<h4><strong>Conclusion\u00a0:<\/strong><\/h4>\n<p>Il semble \u00e9vident que la proximit\u00e9 avec des personnes infect\u00e9es et la dur\u00e9e du temps pass\u00e9 avec ces personnes influent sur le risque de contamination.<\/p>\n<p>Pour autant le postulat selon lequel le taux d\u2019infection serait directement proportionnel au produit du temps pass\u00e9 sur place et de la densit\u00e9 de personnes infect\u00e9es par unit\u00e9 de surface est remis en question. (4)<\/p>\n<p>La principale conclusion des auteurs de l\u2019\u00e9tude est que restreindre la <strong>densit\u00e9 d\u2019occupation<\/strong> de chaque endroit serait plus efficace que de r\u00e9duire uniform\u00e9ment la mobilit\u00e9.<\/p>\n<p><strong>Or \u2018r\u00e9duire la densit\u00e9\u2019, n\u2019est-ce pas justement ce que la plupart des restaurants ont appliqu\u00e9 en respectant les r\u00e8gles de distanciation sociale\u00a0?<\/strong><\/p>\n<p><strong>Il est clair que le d\u00e9ploiement des terrasses, la ventilation des lieux, le respect de la distanciation sociale ainsi que les gestes barri\u00e8re sont d\u00e9terminants\u00a0!\u00a0Or ces facteurs ne sont pas pris en compte dans l\u2019\u00e9tude en question.<\/strong><\/p>\n<p><strong>Celle-ci ne devrait donc pas \u00eatre utilis\u00e9e comme un \u00e9tendard, ayant pour r\u00e9sultat de stigmatiser les restaurants de mani\u00e8re binaire et \u00f4 combien dommageable \u00e0 notre secteur qui n\u2019en avait d\u00e9cid\u00e9ment pas besoin ! <\/strong><\/p>\n<p>&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<\/p>\n<p>(1) \u00ab\u00a0Mobility network models of COVID-19 explain inequities and inform reopening\u00a0\u00bb<br \/>Serina Chang, Emma Pierson, Pang Wei Koh, Jaline Gerardin, Beth Redbird, David Grusky\u00a0&amp;\u00a0Jure Leskovec<br \/><a href=\"https:\/\/www.nature.com\/articles\/s41586-020-2923-3\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"background-color: #ffffff;\">https:\/\/www.nature.com\/articles\/s41586-020-2923-3<\/a><\/p>\n<p>(2)\u00a0L<span>a premi\u00e8re critique de certains d\u00e9tracteurs est de dire comment peut-on \u00e9valuer l\u2019impact de la pr\u00e9sence du public dans des endroits comme des restaurants ou des clubs de gym \u00e0 une p\u00e9riode o\u00f9 ceux-ci \u00e9taient largement ferm\u00e9s en raison du lockdown\u00a0? La r\u00e9ponse donn\u00e9e est amusante\u00a0: \u00ab\u00a0cela ne signifie pas que ces endroits \u00e9taient vides car le personnel ou les propri\u00e9taires de nombreux restaurants y \u00e9taient pr\u00e9sents pour pr\u00e9parer le take away\u00a0\u00bb\u00a0!<br \/><\/span>D\u2019autres soul\u00e8vent l\u2019ambigu\u00eft\u00e9 de la division entre les restaurants (assis \u00e0 table) et les bars et pubs class\u00e9s dans la m\u00eame cat\u00e9gorie.<\/p>\n<p>(3) \u00a0Supplementary information. Point 5\u00a0: Model limitations \u00bb<br \/><a href=\"https:\/\/static-content.springer.com\/esm\/art%3A10.1038%2Fs41586-020-2923-3\/MediaObjects\/41586_2020_2923_MOESM1_ESM.pdf\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"background-color: #ffffff;\">https:\/\/static-content.springer.com\/esm\/art%3A10.1038%2Fs41586-020-2923-3\/MediaObjects\/41586_2020_2923_MOESM1_ESM.pdf<\/a><\/p>\n<p>(4) \u00ab\u00a0But there is nothing in the paper that suggests this assumption (transmission proportional to time x density of infected) is correct.\u00a0\u00bb Revision for Nature manuscript 2020-06-10249A- Comment 3<br \/><a href=\"https:\/\/static-content.springer.com\/esm\/art%3A10.1038%2Fs41586-020-2923-3\/MediaObjects\/41586_2020_2923_MOESM3_ESM.pdf\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"background-color: #ffffff;\">https:\/\/static-content.springer.com\/esm\/art%3A10.1038%2Fs41586-020-2923-3\/MediaObjects\/41586_2020_2923_MOESM3_ESM.pdf<\/a><\/p>\n<p>[\/et_pb_text][et_pb_text _builder_version=\u00a0\u00bb4.4.7&Prime;]<\/p>\n<p style=\"text-align: right;\"><em>Texte : PVW<\/em><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=\u00a0\u00bb1_5,3_5,1_5&Prime; 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_builder_version=\u00a0\u00bb4.4.3&Prime;][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le fameux article\u00a0publi\u00e9 le 10 novembre dans la revue Nature (1) et r\u00e9cemment relay\u00e9 par de nombreux m\u00e9dia m\u00e9rite d\u2019\u00eatre lu attentivement\u2026 et contrairement \u00e0 ce qui a \u00e9t\u00e9 dit ne permet pas de conclure avec certitude que les restaurants seraient des endroits hyper contaminants\u00a0! Certains points de la m\u00e9thode utilis\u00e9e ainsi que les conclusions [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":27944,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","_monsterinsights_skip_tracking":false,"pgc_sgb_lightbox_settings":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[41],"tags":[],"class_list":["post-27951","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualite","et-has-post-format-content","et_post_format-et-post-format-standard"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Les restaurants dangereux ? 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