{"id":209697,"date":"2024-02-12T11:48:02","date_gmt":"2024-02-12T16:48:02","guid":{"rendered":"https:\/\/today.uconn.edu\/?p=209697"},"modified":"2024-02-12T12:19:05","modified_gmt":"2024-02-12T17:19:05","slug":"measles-harbinger-of-herd-immunity-concerns","status":"publish","type":"post","link":"https:\/\/today.uconn.edu\/2024\/02\/measles-harbinger-of-herd-immunity-concerns\/","title":{"rendered":"Measles: Harbinger of Herd Immunity Concerns"},"content":{"rendered":"<p>With measles on the rise worldwide and multiple states in the U.S. reporting cases, a real-life illustration of the effectiveness of childhood vaccinations is unfolding.<\/p>\n<p>And it\u2019s why Connecticut is in better position than most states to avoid an outbreak, according to a UConn Health and Connecticut Children&#8217;s pediatric infectious diseases expert.<\/p>\n<p>One of the world\u2019s most contagious diseases, measles was declared eliminated from the U.S. by the Centers for Disease Control and Prevention in 2000.<\/p>\n<figure id=\"attachment_209701\" aria-describedby=\"caption-attachment-209701\" style=\"width: 240px\" class=\"wp-caption alignright\"><a href=\"https:\/\/facultydirectory.uchc.edu\/profile?profileId=Held-Tobin-Melissa\"><img decoding=\"async\" class=\"size-medium wp-image-209701 img-responsive lazyload\" data-src=\"https:\/\/today.uconn.edu\/wp-content\/uploads\/2024\/02\/held-melissa-20191120-encarnacion-0001-1000x1250-1-240x300.jpg\" alt=\"Dr. Melissa Held portrait white coat\" width=\"240\" height=\"300\" data-srcset=\"https:\/\/today.uconn.edu\/wp-content\/uploads\/2024\/02\/held-melissa-20191120-encarnacion-0001-1000x1250-1-240x300.jpg 240w, https:\/\/today.uconn.edu\/wp-content\/uploads\/2024\/02\/held-melissa-20191120-encarnacion-0001-1000x1250-1-819x1024.jpg 819w, https:\/\/today.uconn.edu\/wp-content\/uploads\/2024\/02\/held-melissa-20191120-encarnacion-0001-1000x1250-1-768x960.jpg 768w, https:\/\/today.uconn.edu\/wp-content\/uploads\/2024\/02\/held-melissa-20191120-encarnacion-0001-1000x1250-1-336x420.jpg 336w, https:\/\/today.uconn.edu\/wp-content\/uploads\/2024\/02\/held-melissa-20191120-encarnacion-0001-1000x1250-1-532x665.jpg 532w, https:\/\/today.uconn.edu\/wp-content\/uploads\/2024\/02\/held-melissa-20191120-encarnacion-0001-1000x1250-1.jpg 1000w\" data-sizes=\"(max-width: 240px) 100vw, 240px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 240px; --smush-placeholder-aspect-ratio: 240\/300;\" \/><\/a><figcaption id=\"caption-attachment-209701\" class=\"wp-caption-text\">Dr. Melissa Held is a professor of pediatric infectious diseases and the senior associate dean of medical student education at the UConn School of Medicine. (Tina Encarnacion\/UConn Health photo)<\/figcaption><\/figure>\n<p>\u201cMeasles was not eradicated, but under very good control in many regions in the world due to the success of various vaccination campaigns,\u201d says <a href=\"https:\/\/facultydirectory.uchc.edu\/profile?profileId=Held-Tobin-Melissa\">Dr. Melissa Held<\/a>, professor of pediatric infectious diseases at the UConn School of Medicine. \u201cWe are hearing about it again because of various factors, including suboptimal vaccine coverage, vaccine hesitancy, international travel, and importation of the virus.\u201d<\/p>\n<p>Held says an increase in measles usually occurs because of an increase in the number of travelers who get measles abroad and bring it into the U.S. and\/or spread within the U.S. in communities where there are pockets of unvaccinated people. But the recent cases in our country are concerning given more widespread outbreaks globally.<\/p>\n<p>Another reason for concern is the decline in the rate of young children completing their recommended vaccination schedules since the pandemic, which Held says has led to communities falling short of the herd immunity target vaccination level of 95%.<\/p>\n<p>\u201cHigh vaccine coverage in populations is essential for achieving herd immunity, which protects individuals who cannot be vaccinated because of medical or health reasons or because of young age,\u201d Held says. \u201cVaccinations not only protect your child or yourself from these diseases, but they also protect those around you who are not yet old enough to receive the vaccines (infants) or those with impaired immunity.\u201d<\/p>\n<p>The measles-mumps-rubella (MMR) vaccine delivers immunity from measles at a rate of nearly 93% after one dose (usually around age 12 to 15 months) and 97% after a booster usually taken between ages 4 and 6.<\/p>\n<p><!--StartFragment --><\/p>\n<p class=\"pf0\"><span class=\"cf0\"><blockquote>\n  <p>Vaccines are probably the most significant modern medical miracle of our time.<br \/>\n <cite> &#8212 Dr. Melissa Held<\/cite><\/p>\n<\/blockquote><\/span><\/p>\n<p><!--EndFragment --><\/p>\n<p>The World Health Organization says because of its high transmissibility, measles can serve as an early warning system by exposing immunity gaps in a population.<\/p>\n<p>The latest available data on vaccination rates in Connecticut show ours among the leading states, with more than 97% of kindergarteners having received the required MMR vaccines in the 2022-23 school year.<\/p>\n<p>\u201cConnecticut tends to do much better than the rest of the country, not just with the MMR vaccine but with all other vaccines as well,\u201d Held says. \u201cUnfortunately, the national average of coverage is lower than the ideal 95% threshold, so there are many states with increased risk of outbreaks.\u201d<\/p>\n<p><a href=\"https:\/\/www.cdc.gov\/vaccines\/schedules\/hcp\/imz\/child-adolescent.html\">See the CDC\u2019s current recommendations on child and adolescent immunizations.<\/a><\/p>\n<p>Held, who is <a href=\"https:\/\/medicaleducation.uconn.edu\/student-support\/medical-student-affairs\/\">UConn\u2019s senior associate dean of medical student education<\/a> and also sees hospitalized patients at Connecticut Children\u2019s, recommends parents who are hesitant to follow the recommended vaccination schedule for their children share their concerns with their pediatrician and try to tune out the noise.<\/p>\n<p>\u201cLook to reputable source of information like CDC, World Health Organization and the American Academy of Pediatrics; the internet is full of misinformation and random opinions that are not scientifically sound,\u201d Held says. \u201cVaccines are probably the most significant modern medical miracle of our time. The reason we do not worry about our children and family members becoming sick or dying from these diseases is because we have such effective vaccines.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Connecticut in relatively good position to fight off resurgence, says UConn Health expert<\/p>\n","protected":false},"author":111,"featured_media":209705,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_crdt_document":"","wds_primary_category":0,"wds_primary_series":0,"wds_primary_attribution":0,"footnotes":""},"categories":[2231,1868,2235,179],"tags":[],"magazine-issues":[],"coauthors":[2010],"class_list":["post-209697","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health-well-being","category-meds","category-today-homepage","category-uconn-health"],"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","acf":[],"publishpress_future_action":{"enabled":false,"date":"2026-05-25 18:37:28","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"category","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/today.uconn.edu\/wp-rest\/wp\/v2\/posts\/209697","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/today.uconn.edu\/wp-rest\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/today.uconn.edu\/wp-rest\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/today.uconn.edu\/wp-rest\/wp\/v2\/users\/111"}],"replies":[{"embeddable":true,"href":"https:\/\/today.uconn.edu\/wp-rest\/wp\/v2\/comments?post=209697"}],"version-history":[{"count":9,"href":"https:\/\/today.uconn.edu\/wp-rest\/wp\/v2\/posts\/209697\/revisions"}],"predecessor-version":[{"id":209717,"href":"https:\/\/today.uconn.edu\/wp-rest\/wp\/v2\/posts\/209697\/revisions\/209717"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/today.uconn.edu\/wp-rest\/wp\/v2\/media\/209705"}],"wp:attachment":[{"href":"https:\/\/today.uconn.edu\/wp-rest\/wp\/v2\/media?parent=209697"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/today.uconn.edu\/wp-rest\/wp\/v2\/categories?post=209697"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/today.uconn.edu\/wp-rest\/wp\/v2\/tags?post=209697"},{"taxonomy":"magazine-issue","embeddable":true,"href":"https:\/\/today.uconn.edu\/wp-rest\/wp\/v2\/magazine-issues?post=209697"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/today.uconn.edu\/wp-rest\/wp\/v2\/coauthors?post=209697"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}