L’efficacit\u00e9 des vaccins de Pfizer et Moderna contre l’infection au Covid-19 a baiss\u00e9 de 91% \u00e0 66% depuis que le variant Delta est devenu dominant aux Etats-Unis, selon des donn\u00e9es publi\u00e9es mardi 24 aout 2021, par les autorit\u00e9s sanitaires am\u00e9ricaines.<\/p>\n\n\n\n
Ces donn\u00e9es proviennent d’une \u00e9tude men\u00e9e sur des milliers d’employ\u00e9s de centres de soins et d’h\u00f4pitaux dans six Etats, afin d’examiner les performances des vaccins en conditions r\u00e9elles. Les participants sont test\u00e9s chaque semaine pour d\u00e9tecter \u00e0 la fois les infections symptomatiques mais aussi asymptomatiques.<\/p>\n\n\n\n
La quasi totalit\u00e9 du personnel de sant\u00e9 vaccin\u00e9 a re\u00e7u les s\u00e9rums de Pfizer ou de Moderna. Entre d\u00e9cembre 2020 et avril 2021, l’efficacit\u00e9 des vaccins pour emp\u00eacher l’infection \u00e9tait de 91%, selon ces donn\u00e9es publi\u00e9es par les Centres de lutte et de pr\u00e9vention des maladies (CDC), principale agence f\u00e9d\u00e9rale de sant\u00e9 publique du pays. Mais sur les semaines o\u00f9 le variant Delta est devenu dominant, c’est-\u00e0-dire o\u00f9 il \u00e9tait responsable de plus de 50% des cas selon le s\u00e9quen\u00e7age, l’efficacit\u00e9 est tomb\u00e9e \u00e0 66%.<\/p>\n","protected":false},"excerpt":{"rendered":"
L’efficacit\u00e9 des vaccins de Pfizer et Moderna contre l’infection au Covid-19 a baiss\u00e9 de 91% \u00e0 66% depuis que le variant Delta est devenu dominant aux Etats-Unis, selon des donn\u00e9es publi\u00e9es mardi 24 aout 2021, par les autorit\u00e9s sanitaires am\u00e9ricaines. Ces donn\u00e9es proviennent d’une \u00e9tude men\u00e9e sur des milliers d’employ\u00e9s de centres de soins et […]<\/p>\n","protected":false},"author":4,"featured_media":32296,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","jnews-multi-image_gallery":[],"jnews_single_post":{"subtitle":"","format":"standard","video":"","gallery":"","source_name":"","source_url":"","via_name":"","via_url":"","override":[{"single_blog_custom":"","sidebar":"","second_sidebar":"","share_position":"","share_float_style":"","post_date_format":"","post_date_format_custom":"","post_reading_time_wpm":"","zoom_button_out_step":"1","zoom_button_in_step":"1","number_popup_post":"1"}],"image_override":[{"single_post_thumbnail_size":"","single_post_gallery_size":""}],"trending_post_position":"","trending_post_label":"","sponsored_post_label":"","sponsored_post_name":"","sponsored_post_url":"","sponsored_post_logo":"","sponsored_post_desc":""},"jnews_primary_category":{"id":""},"jnews_override_bookmark_settings":[],"jnews_review":[],"enable_review":"","type":"","name":"","summary":"","brand":"","sku":"","good":[],"bad":[],"score_override":"","override_value":"","rating":[],"price":[],"jnews_post_split":[],"footnotes":""},"categories":[11],"tags":[],"class_list":["post-32295","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health"],"_links":{"self":[{"href":"https:\/\/www.africanchallenges.com\/index.php?rest_route=\/wp\/v2\/posts\/32295","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.africanchallenges.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.africanchallenges.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.africanchallenges.com\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.africanchallenges.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=32295"}],"version-history":[{"count":1,"href":"https:\/\/www.africanchallenges.com\/index.php?rest_route=\/wp\/v2\/posts\/32295\/revisions"}],"predecessor-version":[{"id":32297,"href":"https:\/\/www.africanchallenges.com\/index.php?rest_route=\/wp\/v2\/posts\/32295\/revisions\/32297"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.africanchallenges.com\/index.php?rest_route=\/wp\/v2\/media\/32296"}],"wp:attachment":[{"href":"https:\/\/www.africanchallenges.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=32295"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.africanchallenges.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=32295"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.africanchallenges.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=32295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}