{"id":2958,"date":"2026-03-13T15:29:09","date_gmt":"2026-03-13T14:29:09","guid":{"rendered":"https:\/\/biotechlerncenter.iph-multisite.berta-bewegt.ch\/?page_id=2958"},"modified":"2026-03-13T19:19:25","modified_gmt":"2026-03-13T18:19:25","slug":"document-de-travail","status":"publish","type":"page","link":"https:\/\/biotechlerncenter.interpharma.ch\/fr\/sujets\/vaccination\/document-de-travail\/","title":{"rendered":"Document de travail"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><strong>Questions relatives \u00e0 la compr\u00e9hension du texte<\/strong><\/h2>\n\n\n\n<p><strong>Question: Que devrait produire un bon vaccin?<\/strong><\/p>\n\n\n\n<p>R\u00e9ponse: le vaccin \u00e9paule le syst\u00e8me immunitaire humain afin qu&rsquo;il soit mieux pr\u00e9par\u00e9 aux attaques perp\u00e9tr\u00e9es par certains agents pathog\u00e8nes tels que virus, bact\u00e9ries ou autres micro-organismes. Le vaccin veille \u00e0 ce que le corps constitue un \u00ab\u00a0avis de recherche\u00a0\u00bb de l&rsquo;agent pathog\u00e8ne sous forme de cellules m\u00e9moire T et d&rsquo;anticorps (cellules B).<\/p>\n\n\n\n<p><strong>Question: Pourquoi &#8211; lors de l&rsquo;immunisation passive&nbsp;<\/strong><strong>\u2013<\/strong><strong>&nbsp;doit-on la plupart du temps vacciner \u00e0 plusieurs reprises?<\/strong><\/p>\n\n\n\n<p>R\u00e9ponse: l&rsquo;immunisation passive agit certes imm\u00e9diatement mais durant un temps restreint: les anticorps introduits sont peu \u00e0 peu r\u00e9sorb\u00e9s par le corps pour finalement dispara\u00eetre. C&rsquo;est pourquoi la vaccination doit \u00eatre reprise apr\u00e8s un certain temps.<\/p>\n\n\n\n<p><strong>Question: le nourrisson sera vaccin\u00e9 \u00e0 2 mois d\u00e9j\u00e0 et selon le plan de vaccination contre la dipht\u00e9rie, le t\u00e9tanos, la coqueluche, l&rsquo;haemophilus influenzae et la polio.&nbsp; Par contre, il ne se fera vacciner contre la rougeole, les oreillons et la varicelle qu&rsquo;apr\u00e8s 12 mois. Pourquoi?<\/strong><\/p>\n\n\n\n<p>R\u00e9ponse: Certains agents pathog\u00e8nes (par ex. les virus de la dipht\u00e9rie ou de la polio) sont si agressifs qu&rsquo;un nourrisson ne pourrait s&rsquo;en sortir malgr\u00e9 son immunit\u00e9 inn\u00e9e. C&rsquo;est pourquoi les vaccinations contre ces maladies seront effectu\u00e9es le plus t\u00f4t possible.<\/p>\n\n\n\n<p>La devise \u00abvacciner le plus t\u00f4t possible\u00bb ne conduit pourtant pas toujours aux meilleurs r\u00e9sultats. La protection immunitaire maternelle en est la raison. La m\u00e8re assure une protection \u00e0 son nourrisson par une multitude d&rsquo;anticorps maternels le pr\u00e9servant durant les premiers mois de sa vie. Cette protection dispara\u00eet apr\u00e8s quelques mois. Le nourrisson re\u00e7oit \u00e9galement de sa m\u00e8re des anticorps contre la rougeole, les oreillons et la varicelle. S&rsquo;il \u00e9tait vaccin\u00e9 contre la rougeole, les oreillons et la varicelle \u00e0 2 mois, les anticorps d\u00e9j\u00e0 pr\u00e9sents diminueraient l&rsquo;effet de cette vaccination. En effet, les virus att\u00e9nu\u00e9s du vaccin doivent d\u00e9clencher une l\u00e9g\u00e8re infection dans le corps afin d&rsquo;engendrer une protection suffisante. Mais la pr\u00e9sence d&rsquo;anticorps maternels emp\u00eacherait cette action. C&rsquo;est la raison pour laquelle la vaccination contre la rougeole est effectu\u00e9e la plupart du temps 12 mois apr\u00e8s la naissance.<\/p>\n\n\n\n<p><strong>Question: Pourquoi la vaccination contre la grippe doit-elle \u00eatre effectu\u00e9e chaque ann\u00e9e?<\/strong><\/p>\n\n\n\n<p>R\u00e9ponse: les virus de la grippe sont &#8211; comme tout autre organisme &#8211; assujettis \u00e0 des modifications continues. Pour ce faire, des prot\u00e9ines importantes se trouvant \u00e0 leur surface et servant d&rsquo;avis de recherche au syst\u00e8me immunitaire humain vont \u00eatre modifi\u00e9es de telle sorte qu&rsquo;elles ne soient plus reconnues par les cellules de d\u00e9fense. A chaque \u00e9pid\u00e9mie de grippe, on assiste \u00e0 l&rsquo;apparition de virus nouvellement form\u00e9s et auxquels le syst\u00e8me immunitaire n\u2019a jamais \u00e9t\u00e9 confront\u00e9. Cette tactique de \u00abcache-cache\u00bb est \u00e9galement utilis\u00e9e par le virus VHI afin d&rsquo;\u00e9chapper au syst\u00e8me de d\u00e9fense humain.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Questions relatives \u00e0 la compr\u00e9hension du texte Question: Que devrait produire un bon vaccin? R\u00e9ponse: le vaccin \u00e9paule le syst\u00e8me immunitaire humain afin qu&rsquo;il soit mieux pr\u00e9par\u00e9 aux attaques perp\u00e9tr\u00e9es par certains agents pathog\u00e8nes tels que virus, bact\u00e9ries ou autres micro-organismes. Le vaccin veille \u00e0 ce que le corps constitue un \u00ab\u00a0avis de recherche\u00a0\u00bb de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1206,"menu_order":10,"comment_status":"closed","ping_status":"closed","template":"page-templates\/unterthema.php","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-2958","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Document de travail - biotechlerncenter<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/biotechlerncenter.interpharma.ch\/themen\/impfen-selbstverteidigung-fuer-das-immunsystem\/links\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Document de travail\" \/>\n<meta property=\"og:description\" content=\"Questions relatives \u00e0 la compr\u00e9hension du texte Question: Que devrait produire un bon vaccin? R\u00e9ponse: le vaccin \u00e9paule le syst\u00e8me immunitaire humain afin qu&rsquo;il soit mieux pr\u00e9par\u00e9 aux attaques perp\u00e9tr\u00e9es par certains agents pathog\u00e8nes tels que virus, bact\u00e9ries ou autres micro-organismes. 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