{"id":2675,"date":"2020-12-17T10:02:58","date_gmt":"2020-12-17T09:02:58","guid":{"rendered":"http:\/\/webecpol.esade.edu\/publicaciones\/tests-de-antigenos-masivos\/"},"modified":"2021-03-10T23:23:06","modified_gmt":"2021-03-10T22:23:06","slug":"tests-antigens-massius","status":"publish","type":"publicaciones","link":"http:\/\/webecpol.esade.edu\/ca\/publicacions\/tests-antigens-massius\/","title":{"rendered":"Tests d&#8217;ant\u00edgens massius i focalitzats per respondre a la tercera onada: una proposta"},"content":{"rendered":"<h2 class=\"post__summary\">EsadeEcPol | Policy Insight<\/h2>\n<h6><em>Aquest document forma part de la l\u00ednia de recerca de covid-19, dirigida per Jorge Galindo<\/em><\/h6>\n<p>&nbsp;<\/p>\n<h4>Resum executiu<\/h4>\n<p>La tercera onada de contagis est\u00e0 repuntant a Europa i, tot i que la vacunaci\u00f3 contra la pand\u00e8mia de covid-19 comen\u00e7ar\u00e0 en les pr\u00f2ximes setmanes, la seva implementaci\u00f3 no ser\u00e0 tan r\u00e0pida com desitjar\u00edem, una realitat que ens obligar\u00e0 a bregar amb el virus durant alguns mesos m\u00e9s.<\/p>\n<ul>\n<li>La bona not\u00edcia \u00e9s que els aven\u00e7os en els m\u00e8todes de testeig poden ajudar molt a reduir la incid\u00e8ncia de la tercera onada. Els tests d&#8217;ant\u00edgens estan disponibles i s\u00f3n barats i r\u00e0pids. No obstant aix\u00f2, s\u00f3n poc precisos. Aqu\u00ed proposem una estrat\u00e8gia realista i molt efica\u00e7, dissenyada per detectar i prevenir brots: el testeig focalitzat.<\/li>\n<li>Els tests focalitzats tenen com a objectiu <strong>minimitzar l&#8217;aparici\u00f3 de falsos negatius i falsos positius<\/strong> al desenvolupar la prova en tres rondes:\n<ul>\n<li>Primera ronda. Es fa un test per persona: si el test \u00e9s negatiu, es notifica com &#8220;no concloent&#8221;; en cas contrari, es requereix una segona ronda.<\/li>\n<li>Segona ronda. Es fan dos tests: si els dos nous tests donen negatiu, es notifica el cas com &#8220;no concloent&#8221;; si tots dos donen positiu, es notifica com a &#8220;positiu&#8221;; en cas contrari es requereix una tercera ronda.<\/li>\n<li>Tercera ronda. Es fa un test addicional: si el test \u00e9s positiu es classifica com a &#8220;positiu&#8221;; en cas contrari, com no concloent.<\/li>\n<\/ul>\n<\/li>\n<li>La nostra simulaci\u00f3 per a Espanya conclou que <strong>una estrat\u00e8gia de tests focalitzats podria multiplicar per 30 el valor de predicci\u00f3 general de les proves<\/strong> (del 2,6% al 90%) a les zones de baixa incid\u00e8ncia del virus (all\u00e0 on un de cada mil espanyols sigui portador del virus, una situaci\u00f3 que \u00e9s probable que ens trobem diverses vegades en les pr\u00f2ximes setmanes i mesos).<\/li>\n<li><strong>Aquestes millores s&#8217;aconseguirien mitjan\u00e7ant una inversi\u00f3 relativament petita: un 10% m\u00e9s de proves<\/strong> seria suficient. A m\u00e9s, considerem el test doble, una estrat\u00e8gia alternativa que permetria reduir al m\u00e0xim els falsos negatius. Aquesta estrat\u00e8gia podria ser <strong>particularment adequada per a zones &#8220;vermelles&#8221;<\/strong>, \u00e9s a dir, aquelles \u00e0rees m\u00e9s petites en qu\u00e8 el nivell de contagi \u00e9s intens (ciutats, districtes o prov\u00edncies).<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Proposem una estrat\u00e8gia realista i molt efica\u00e7, dissenyada per detectar i prevenir brots: el testeig focalitzat.<\/p>\n","protected":false},"featured_media":2666,"template":"","yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Tests d&#039;ant\u00edgens massius i focalitzats per respondre a la tercera onada: una proposta - Center for Economic Policy - EsadeEcPol<\/title>\n<meta name=\"description\" content=\"En aquest Policy Insight proposem una estrat\u00e8gia realista i molt efica\u00e7, dissenyada per detectar i prevenir brots: el testeig focalitzat.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/webecpol.esade.edu\/ca\/publicacions\/tests-antigens-massius\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tests d&#039;ant\u00edgens massius i focalitzats per respondre a la tercera onada: una proposta - 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