{"id":217808,"date":"2021-08-25T21:32:22","date_gmt":"2021-08-25T20:32:22","guid":{"rendered":"https:\/\/www.realites.com.tn\/?p=217808"},"modified":"2021-08-25T21:32:22","modified_gmt":"2021-08-25T20:32:22","slug":"au-bout-de-six-mois-la-protection-des-vaccins-baisse-significativement","status":"publish","type":"post","link":"https:\/\/realites.com.tn\/fr\/au-bout-de-six-mois-la-protection-des-vaccins-baisse-significativement\/","title":{"rendered":"Au bout de six mois, la protection des vaccins baisse significativement"},"content":{"rendered":"<div>Six mois apr\u00e8s la vaccination, la protection des s\u00e9rums Pfizer et AstraZeneca diminue notablement. C\u2019est la conclusion d\u2019une \u00e9tude britannique d\u00e9voil\u00e9e ce mercredi 25 ao\u00fbt. Au vu de ces r\u00e9sultats, les auteurs plaident en faveur de campagnes de rappels. Un mois apr\u00e8s avoir re\u00e7u la deuxi\u00e8me dose, le vaccin Pfizer permet d\u2019\u00e9viter \u00e0 88 % d\u2019\u00eatre contamin\u00e9 par le Covid-19, mais cette protection tombe \u00e0 74 % apr\u00e8s cinq \u00e0 six mois, selon la derni\u00e8re analyse de l\u2019\u00e9tude Zoe Covid.<\/div>\n<div>Pour le vaccin d\u2019AstraZeneca, l\u2019efficacit\u00e9 passe de 77 % un mois apr\u00e8s l\u2019administration de la deuxi\u00e8me dose \u00e0 67 % apr\u00e8s quatre \u00e0 cinq mois, affirme l\u2019\u00e9tude. Celle-ci a \u00e9t\u00e9 r\u00e9alis\u00e9e \u00e0 partir de donn\u00e9es collect\u00e9es aupr\u00e8s d\u2019environ un million d\u2019utilisateurs de l\u2019application Zoe, mise en place par un groupe priv\u00e9 du m\u00eame nom. Ces donn\u00e9es ont ensuite \u00e9t\u00e9 analys\u00e9es par les chercheurs du King\u2019s College de Londres et de l\u2019\u00e9quipe de Zoe.<\/div>\n<div><\/div>\n<div><strong>*Une protection inf\u00e9rieure \u00e0 50 %<\/strong><\/div>\n<div>Les chercheurs ont \u00e9tudi\u00e9 les contaminations survenues entre le 26 mai et le 31 juillet 2021 chez des personnes ayant charg\u00e9 l\u2019application entre le 8 d\u00e9cembre 2020 et le 3 juillet 2021 apr\u00e8s avoir \u00e9t\u00e9 vaccin\u00e9es. La campagne de vaccination britannique, qui a actuellement administr\u00e9 une deuxi\u00e8me dose \u00e0 77 % des plus de 16 ans, a vis\u00e9 en priorit\u00e9 les personnes \u00e2g\u00e9es et celles consid\u00e9r\u00e9es comme fragiles ainsi que les travailleurs de la sant\u00e9. Ces groupes sont donc, selon les chercheurs du King\u2019s College, ceux chez qui la protection a le plus diminu\u00e9.<\/div>\n<div>Dans un sc\u00e9nario catastrophe \u00ab raisonnable \u00bb, on pourrait voir une protection inf\u00e9rieure \u00e0 50 % pour les personnes \u00e2g\u00e9es et le personnel de sant\u00e9 d\u2019ici l\u2019hiver, a estim\u00e9 le professeur Tim Spector, scientifique \u00e0 la t\u00eate du projet. Si ce chiffre concerne les contaminations et non les formes graves, cela pourrait se traduire par une augmentation des hospitalisations et des d\u00e9c\u00e8s si le pays est soumis \u00e0 des niveaux de contamination \u00e9lev\u00e9s et \u00e0 un variant hautement transmissible.<\/div>\n<div>C\u2019est pourquoi le chercheur estime \u00ab urgent \u00bb de pr\u00e9voir des rappels de vaccin, ce qui impliquerait aussi de r\u00e9fl\u00e9chir \u00e0 la pertinence de la vaccination des mineurs, \u00ab en fonction des ressources en vaccins \u00bb. Cette question du rappel est d\u00e9sormais envisag\u00e9e par plusieurs pays, dont le Royaume-Uni, qui compte proposer une nouvelle dose aux plus vuln\u00e9rables \u00e0 partir de septembre malgr\u00e9 les r\u00e9ticences de l\u2019Organisation mondiale de la sant\u00e9 (OMS) qui voudrait privil\u00e9gier la vaccination des pays pauvres.<\/div>\n<div style=\"text-align: right\">\u00a0(AFP)<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Six mois apr\u00e8s la vaccination, la protection des s\u00e9rums Pfizer et AstraZeneca diminue notablement. C\u2019est la conclusion d\u2019une \u00e9tude britannique d\u00e9voil\u00e9e ce mercredi 25 ao\u00fbt. Au vu de ces r\u00e9sultats,&hellip;<\/p>\n","protected":false},"author":60,"featured_media":217810,"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-217808","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>Au bout de six mois, la protection des vaccins baisse significativement - R\u00e9alit\u00e9s Magazine<\/title>\n<meta name=\"description\" content=\"Six mois apr\u00e8s la vaccination, la protection des s\u00e9rums Pfizer et AstraZeneca diminue notablement. 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