{"id":5994,"date":"2020-04-28T19:24:59","date_gmt":"2020-04-28T19:24:59","guid":{"rendered":"https:\/\/www.africa-press.com\/senegal\/?p=5994"},"modified":"2020-04-28T19:24:59","modified_gmt":"2020-04-28T19:24:59","slug":"coronavirus-loms-remet-en-cause-le-bien-fonde-des-passeports-immunitaires","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/coronavirus-loms-remet-en-cause-le-bien-fonde-des-passeports-immunitaires","title":{"rendered":"Coronavirus: l&rsquo;OMS remet en cause le bien-fond\u00e9 des \u00abpasseports immunitaires\u00bb"},"content":{"rendered":"<div>Il n&rsquo;existe pas de preuve que les personnes test\u00e9es positives au nouveau coronavirus soient immunis\u00e9es et prot\u00e9g\u00e9es contre une r\u00e9infection, a pr\u00e9venu ce samedi l&rsquo;OMS, estimant que la d\u00e9livrance de \u00ab passeports immunitaires \u00bb risque de favoriser la propagation continue de la pand\u00e9mie.<\/div>\n<div><\/div>\n<div>\u00ab Il n&rsquo;y a actuellement aucune preuve que les personnes qui se sont remises du Covid-19 et qui ont des anticorps soient pr\u00e9munies contre une seconde infection \u00bb, a indiqu\u00e9 ce samedi l&rsquo;Organisation mondiale de la sant\u00e9 dans un communiqu\u00e9. \u00ab \u00c0 la date du 24 avril 2020, aucune \u00e9tude n&rsquo;a \u00e9valu\u00e9 si la pr\u00e9sence d&rsquo;anticorps au SARS-CoV-2 conf\u00e8re une immunit\u00e9 contre une future infection par ce virus chez les humains \u00bb, pr\u00e9cise-t-elle.<\/div>\n<div><\/div>\n<div>Certains gouvernements ont \u00e9mis l&rsquo;id\u00e9e de d\u00e9livrer des documents attestant l&rsquo;immunit\u00e9 des personnes sur la base de tests s\u00e9rologiques r\u00e9v\u00e9lant la pr\u00e9sence d&rsquo;anticorps dans le sang, de fa\u00e7on \u00e0 d\u00e9confiner et \u00e0 permettre peu \u00e0 peu leur retour au travail et la reprise de l&rsquo;activit\u00e9 \u00e9conomique.<\/div>\n<div><\/div>\n<div>Mais l&rsquo;efficacit\u00e9 d&rsquo;une immunisation gr\u00e2ce aux anticorps n&rsquo;est pas \u00e9tablie \u00e0 ce stade et les donn\u00e9es scientifiques disponibles ne permettent pas justifier l&rsquo;octroi d&rsquo;un \u00ab passeport immunitaire \u00bb ou d&rsquo;un \u00ab certificat d&rsquo;absence de risque \u00bb, avertit l&rsquo;OMS.<\/div>\n<div><\/div>\n<div>Les tests s\u00e9rologiques actuels pas encore assez fiables<\/div>\n<div><\/div>\n<div>\u00ab Les personnes qui pensent \u00eatre immunis\u00e9es contre une seconde infection parce qu&rsquo;elles ont \u00e9t\u00e9 test\u00e9es positives pourraient ignorer les recommandations de sant\u00e9 publique. Le recours \u00e0 ce genre de certificats pourrait en cons\u00e9quence augmenter les risques que la transmission continue \u00bb, insiste-t-elle.<\/div>\n<div><\/div>\n<div>L&rsquo;OMS estime par ailleurs que les tests s\u00e9rologiques actuellement utilis\u00e9s \u00ab ont besoin d&rsquo;une validation suppl\u00e9mentaire pour d\u00e9terminer leur exactitude et leur fiabilit\u00e9 \u00bb. Ils doivent en particulier permettre de distinguer la r\u00e9ponse immunitaire au nouveau coronavirus des anticorps produits \u00e0 l&rsquo;occasion d&rsquo;une infection par un autre des six coronavirus humains connus, dont quatre sont largement r\u00e9pandus, provoquant des rhumes b\u00e9nins. Les deux autres sont \u00e0 l&rsquo;origine du Mers (Syndrome respiratoire du Moyen-Orient) et du Sras (Syndrome respiratoire aigu s\u00e9v\u00e8re).<\/div>\n<div><\/div>\n<div>Or, souligne l&rsquo;OMS, \u00ab les personnes infect\u00e9es par l&rsquo;un ou l&rsquo;autre de ces virus sont susceptibles de produire des anticorps qui interagissent avec des anticorps produits en r\u00e9ponse \u00e0 l&rsquo;infection provoqu\u00e9e par le SARS-CoV-2 \u00bb, et il est donc imp\u00e9ratif de pouvoir les identifier.<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Il n&rsquo;existe pas de preuve que les personnes test\u00e9es positives au nouveau coronavirus soient immunis\u00e9es et prot\u00e9g\u00e9es contre une r\u00e9infection, a pr\u00e9venu ce samedi l&rsquo;OMS, estimant que la d\u00e9livrance de \u00ab passeports immunitaires \u00bb risque de favoriser la propagation continue de la pand\u00e9mie. \u00ab Il n&rsquo;y a actuellement aucune preuve que les personnes qui se [&hellip;]<\/p>\n","protected":false},"author":56,"featured_media":5995,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21,11,10],"tags":[],"class_list":["post-5994","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-communaute","category-homepage-french","category-toutes-les-actualites"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - 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