{"id":2365852,"date":"2020-05-15T09:05:46","date_gmt":"2020-05-15T13:05:46","guid":{"rendered":"https:\/\/www.futurity.org\/?p=2365852"},"modified":"2020-05-15T11:05:14","modified_gmt":"2020-05-15T15:05:14","slug":"asymptomatic-covid-19-immunity-viruses-2365852-2","status":"publish","type":"post","link":"https:\/\/www.futurity.org\/asymptomatic-covid-19-immunity-viruses-2365852-2\/","title":{"rendered":"Asymptomatic spread makes testing key for COVID-19 fight"},"content":{"rendered":"

The prevalence of asymptomatic cases\u2014people infected with the virus who can spread it to others but don’t feel sick\u2014is one of the most challenging aspects of the coronavirus pandemic, researchers say.<\/p>\n

In Iceland, where a broad testing effort resulted in 5% of the country’s population getting tested for COVID-19, a lab study suggested that as many as 50% of people who have the disease show no symptoms<\/a>. A study conducted in Singapore showed that patients with COVID-19 can spread the disease without showing symptoms themselves.<\/p>\n

Here, Gigi Gronvall, an immunologist and senior scholar at the Johns Hopkins Center for Health Security and an associate professor at the Johns Hopkins Bloomberg School of Public Health, discusses the challenges of tracing the spread of coronavirus, the importance of testing, and the dangerous appeal of “immunity passports”:<\/p>\n","protected":false},"excerpt":{"rendered":"

The prevalence of asymptomatic cases\u2014people infected with the virus who can spread it to others […]<\/p>\n","protected":false},"author":7072,"featured_media":2366902,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"quote","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[14],"tags":[185622,8790,1303,1620,8825],"class_list":["post-2365852","post","type-post","status-publish","format-quote","has-post-thumbnail","hentry","category-health-medicine","tag-covid-19","tag-immune-systems","tag-infections","tag-symptoms","tag-viruses","post_format-post-format-quote","university-johns-hopkins-university"],"acf":[],"yoast_head":"\nAsymptomatic spread makes testing key for COVID-19 fight - 糖心视频<\/title>\n<meta name=\"description\" content=\""Because of asymptomatic spread of the coronavirus, we're going to need a lot more testing and have public health officials actively look for cases."\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.futurity.org\/asymptomatic-covid-19-immunity-viruses-2365852-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Asymptomatic spread makes testing key for COVID-19 fight\" \/>\n<meta property=\"og:description\" content=\""Because of asymptomatic spread of the coronavirus, we're going to need a lot more testing and have public health officials actively look for cases."\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.futurity.org\/asymptomatic-covid-19-immunity-viruses-2365852-2\/\" \/>\n<meta property=\"og:site_name\" content=\"糖心视频\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/pages\/糖心视频\/143906865226\" \/>\n<meta property=\"article:published_time\" content=\"2020-05-15T13:05:46+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-05-15T15:05:14+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.futurity.org\/wp\/wp-content\/uploads\/2020\/05\/asymptomatic-COVID-19-3_1600.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1600\" \/>\n\t<meta property=\"og:image:height\" content=\"915\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Johns Hopkins University\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@糖心视频News\" \/>\n<meta name=\"twitter:site\" content=\"@糖心视频News\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Johns Hopkins University\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.futurity.org\/asymptomatic-covid-19-immunity-viruses-2365852-2\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.futurity.org\/asymptomatic-covid-19-immunity-viruses-2365852-2\/\"},\"author\":{\"name\":\"Johns Hopkins University\",\"@id\":\"https:\/\/www.futurity.org\/#\/schema\/person\/5ecbc6b239ee7ae78e5a33fad4f06908\"},\"headline\":\"Asymptomatic spread makes testing key for COVID-19 fight\",\"datePublished\":\"2020-05-15T13:05:46+00:00\",\"dateModified\":\"2020-05-15T15:05:14+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.futurity.org\/asymptomatic-covid-19-immunity-viruses-2365852-2\/\"},\"wordCount\":144,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.futurity.org\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.futurity.org\/asymptomatic-covid-19-immunity-viruses-2365852-2\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.futurity.org\/wp\/wp-content\/uploads\/2020\/05\/asymptomatic-COVID-19-3_1600.jpg\",\"keywords\":[\"COVID-19\",\"immune systems\",\"infections\",\"symptoms\",\"viruses\"],\"articleSection\":[\"Health and Medicine\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.futurity.org\/asymptomatic-covid-19-immunity-viruses-2365852-2\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.futurity.org\/asymptomatic-covid-19-immunity-viruses-2365852-2\/\",\"url\":\"https:\/\/www.futurity.org\/asymptomatic-covid-19-immunity-viruses-2365852-2\/\",\"name\":\"Asymptomatic spread makes testing key for COVID-19 fight - 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