{"id":221318,"date":"2021-10-12T13:25:45","date_gmt":"2021-10-12T12:25:45","guid":{"rendered":"https:\/\/www.realites.com.tn\/?p=221318"},"modified":"2021-10-12T13:25:45","modified_gmt":"2021-10-12T12:25:45","slug":"covid-19-les-vaccins-efficaces-a-90-contre-les-formes-graves-selon-une-etude-francaise","status":"publish","type":"post","link":"https:\/\/realites.com.tn\/fr\/covid-19-les-vaccins-efficaces-a-90-contre-les-formes-graves-selon-une-etude-francaise\/","title":{"rendered":"Covid-19 : les vaccins efficaces \u00e0 90% contre les formes graves, selon une \u00e9tude fran\u00e7aise"},"content":{"rendered":"<div>La vaccination contre le Covid-19 r\u00e9duit de 90% le risque d&rsquo;hospitalisation et de d\u00e9c\u00e8s chez les plus de 50 ans et semble aussi efficace face au variant Delta, sur lequel on manque toutefois encore de recul, selon une vaste \u00e9tude fran\u00e7aise en vie r\u00e9elle publi\u00e9e le 11 octobre 2021. \u00ab\u00a0Cela signifie que les personnes vaccin\u00e9es ont 9 fois moins de risque d&rsquo;\u00eatre hospitalis\u00e9es ou de d\u00e9c\u00e9der du Covid-19 que les personnes non vaccin\u00e9es\u00a0\u00bb, explique \u00e0 l&rsquo;AFP l&rsquo;\u00e9pid\u00e9miologiste Mahmoud Zureik, directeur de la structure Epi-Phare, qui associe l&rsquo;Assurance maladie (Cnam) et l&rsquo;Agence du m\u00e9dicament (ANSM).<\/div>\n<div><\/div>\n<div><strong>*Des r\u00e9sultats obtenus aupr\u00e8s de 22 millions de personnes<\/strong><\/div>\n<div>Pour parvenir \u00e0 cette conclusion, les chercheurs d&rsquo;Epi-Phare ont compar\u00e9 les donn\u00e9es de 11 millions de personnes vaccin\u00e9es de plus de 50 ans avec celles de 11 millions de personnes non-vaccin\u00e9es dans la m\u00eame tranche d&rsquo;\u00e2ge, sur une p\u00e9riode allant du 27 d\u00e9cembre 2020 (d\u00e9but de la vaccination en France) au 20 juillet 2021. A partir du 14e jour apr\u00e8s l&rsquo;injection de la seconde dose, les chercheurs ont observ\u00e9 \u00ab\u00a0une r\u00e9duction du risque d&rsquo;hospitalisation sup\u00e9rieure \u00e0 90%\u00a0\u00bb. Ce constat vaut pour les vaccins de Pfizer\/BioNtech, Moderna et AstraZeneca (le quatri\u00e8me autoris\u00e9 en France, celui de Janssen, l&rsquo;a \u00e9t\u00e9 plus tardivement, a \u00e9t\u00e9 utilis\u00e9 dans des proportions moindres et n&rsquo;est donc pas inclus dans l&rsquo;\u00e9tude). \u00ab\u00a0Cette r\u00e9duction est du m\u00eame ordre de grandeur pour le risque de d\u00e9c\u00e8s au cours d&rsquo;une hospitalisation pour Covid-19\u00a0\u00bb, selon Epi-Phare. Cette efficacit\u00e9 sur les formes graves de la maladie \u00ab\u00a0ne semble pas diminuer sur la p\u00e9riode de suivi disponible, qui allait jusqu&rsquo;\u00e0 5 mois\u00a0\u00bb.<\/div>\n<div><\/div>\n<div><strong>*De premiers \u00e9l\u00e9ments concernant le variant Delta<\/strong><\/div>\n<div>Pour cerner l&rsquo;impact du variant Delta, aujourd&rsquo;hui dominant, les chercheurs ont estim\u00e9 de mani\u00e8re sp\u00e9cifique la r\u00e9duction du risque d&rsquo;hospitalisation au cours de la p\u00e9riode o\u00f9 il a pris de l&rsquo;ampleur en France, \u00e0 partir du 20 juin (donc un mois avant la cl\u00f4ture de l&rsquo;\u00e9tude). Ils ont trouv\u00e9 des r\u00e9sultats comparables aux p\u00e9riodes ant\u00e9rieures : une efficacit\u00e9 de 84% chez les 75 ans et plus, et de 92% chez les 50-74 ans. Cela permet de fournir \u00ab\u00a0de premiers \u00e9l\u00e9ments\u00a0\u00bb, mais \u00ab\u00a0cette p\u00e9riode reste tr\u00e8s courte pour \u00e9valuer l&rsquo;impact r\u00e9el de la vaccination sur ce variant\u00a0\u00bb, pr\u00e9viennent les chercheurs, qui poursuivent leur \u00e9tude pour en savoir plus. Ces donn\u00e9es fran\u00e7aises confirment d&rsquo;autres observations faites en vie r\u00e9elle ailleurs dans le monde.<\/div>\n<div style=\"text-align: right\">(Science et Avenir, avec AFP)<\/div>\n","protected":false},"excerpt":{"rendered":"<p>La vaccination contre le Covid-19 r\u00e9duit de 90% le risque d&rsquo;hospitalisation et de d\u00e9c\u00e8s chez les plus de 50 ans et semble aussi efficace face au variant Delta, sur lequel&hellip;<\/p>\n","protected":false},"author":60,"featured_media":221322,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[7],"tags":[],"class_list":["post-221318","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-monde"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Covid-19 : les vaccins efficaces \u00e0 90% contre les formes graves, selon une \u00e9tude fran\u00e7aise - 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