{"id":214037,"date":"2021-06-25T21:39:52","date_gmt":"2021-06-25T20:39:52","guid":{"rendered":"https:\/\/www.realites.com.tn\/?p=214037"},"modified":"2021-06-25T21:39:52","modified_gmt":"2021-06-25T20:39:52","slug":"vaccin-si-lon-attrape-le-covid-apres-la-premiere-dose-voici-ce-qui-se-passe","status":"publish","type":"post","link":"https:\/\/realites.com.tn\/fr\/vaccin-si-lon-attrape-le-covid-apres-la-premiere-dose-voici-ce-qui-se-passe\/","title":{"rendered":"Vaccin: si l&rsquo;on attrape le Covid apr\u00e8s la premi\u00e8re dose, voici ce qui se passe"},"content":{"rendered":"<div>Quel impact sur les risques de maladie grave? Faut-il s&rsquo;injecter sa deuxi\u00e8me dose quand m\u00eame et si oui, quand?<\/div>\n<div>Il est logique de voir de plus en plus de personnes infect\u00e9es par le virus alors qu\u2019elles ont d\u00e9j\u00e0 re\u00e7u leur premi\u00e8re dose, mais pas encore la seconde. Car toutes les donn\u00e9es le montrent, si le vaccin permet de r\u00e9duire les risques deux semaines apr\u00e8s la premi\u00e8re dose, il n\u2019est vraiment tr\u00e8s efficace (80% et plus) qu\u2019apr\u00e8s la seconde dose. Le variant Delta complique encore plus la chose. Selon les donn\u00e9es britanniques, la protection accord\u00e9e par la premi\u00e8re dose passe de 49% \u00e0 31%.<\/div>\n<div>La bonne nouvelle, c\u2019est que si vous \u00eates primo-vaccin\u00e9 et contractez le Covid-19, vos chances de d\u00e9velopper une forme grave sont fortement r\u00e9duites. En effet, l\u2019efficacit\u00e9 des vaccins (Pfizer et AstraZeneca) pour emp\u00eacher l\u2019hospitalisation avec une dose est de 75% contre Delta et 78% contre Alpha. Avec un sch\u00e9ma vaccinal complet, on passe \u00e0 plus de 90%.<\/div>\n<div><\/div>\n<div><strong>*L\u2019infection fait office de seconde dose, \u00e0 une condition<\/strong><\/div>\n<div>En dehors du risque, ce cas de figure pose une question pratique \u00e0 l\u2019heure o\u00f9 le pass sanitaire est en train de s\u2019imposer: une fois gu\u00e9ri, faut-il prendre sa deuxi\u00e8me dose de vaccin? Pour une personne qui a \u00e9t\u00e9 infect\u00e9e par le Covid-19 par le pass\u00e9, une seule dose suffit pour cr\u00e9er un niveau d\u2019immunit\u00e9 similaire, voire sup\u00e9rieur, \u00e0 un sch\u00e9ma vaccinal classique. Mais que se passe-t-il dans l\u2019autre sens?<\/div>\n<div>Interrog\u00e9e sur la question, la virologue Morgane Bomsel explique qu\u2019elle ne conna\u00eet pas d\u2019\u00e9tude sur le sujet. \u201cOn peut supposer que l\u2019infection prime sur cette vaccination inachev\u00e9e, ou encore envisager de faire comme pour les personnes dans l\u2019autre cas: infection, puis une seule dose \u00e0 quelques mois de l\u2019infection, en ignorant la premi\u00e8re vaccination\u201d.<\/div>\n<div>Dans un avis rendu le 18 juin, le Conseil d\u2019orientation de la strat\u00e9gie vaccinale en France conc\u00e8de \u00e9galement qu\u2019il n\u2019y a pas de donn\u00e9es \u201cquant \u00e0 l\u2019immunit\u00e9 induite lorsqu\u2019une infection survient au d\u00e9tour d\u2019une premi\u00e8re dose de vaccin\u201d. Mais les experts conseillent deux sch\u00e9mas vaccinaux:<\/div>\n<div>Si l\u2019infection a lieu moins de 15 jours apr\u00e8s la vaccination, il faut faire sa deuxi\u00e8me dose deux mois apr\u00e8s avoir \u00e9t\u00e9 malade. Pourquoi? Car les deux stimulations du syst\u00e8me immunitaire sont trop \u201crapproch\u00e9es dans le temps\u201d.<\/div>\n<div>Si l\u2019infection a lieu plus de 15 jours apr\u00e8s la vaccination, alors la personne est consid\u00e9r\u00e9e comme enti\u00e8rement vaccin\u00e9e, car l\u2019infection fait office de deuxi\u00e8me dose.<\/div>\n<div>Contact\u00e9e par Le HuffPost, la DGS en France confirme que c\u2019est la directive actuelle. Pour une personne primovaccin\u00e9e puis infect\u00e9e plus de 15 jours apr\u00e8s, \u201cil est possible de modifier de fa\u00e7on r\u00e9troactive dans le syst\u00e8me d\u2019information l\u2019\u00e9tat du parcours vaccinal [pour] obtenir un certificat de vaccination compl\u00e8te\u201d.<\/div>\n<div>En clair, si vous \u00eates dans ce cas, il faut contacter votre centre de vaccination ou votre m\u00e9decin traitant et lui fournir le certificat de premi\u00e8re dose ainsi que celui de votre test PCR positif. En \u00e9change, vous recevrez un certificat de vaccination<\/div>\n<div style=\"text-align: right\">(HuffPost)<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Quel impact sur les risques de maladie grave? Faut-il s&rsquo;injecter sa deuxi\u00e8me dose quand m\u00eame et si oui, quand? Il est logique de voir de plus en plus de personnes&hellip;<\/p>\n","protected":false},"author":60,"featured_media":214039,"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-214037","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>Vaccin: si l&#039;on attrape le Covid apr\u00e8s la premi\u00e8re dose, voici ce qui se passe - R\u00e9alit\u00e9s Magazine<\/title>\n<meta name=\"description\" content=\"Quel impact sur les risques de maladie grave? Faut-il s&#039;injecter sa deuxi\u00e8me dose quand m\u00eame et si oui, quand? 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