{"id":293,"date":"2025-01-09T08:37:00","date_gmt":"2025-01-09T08:37:00","guid":{"rendered":"https:\/\/healthscienceinstitute.org\/?p=293"},"modified":"2025-12-08T06:57:42","modified_gmt":"2025-12-08T06:57:42","slug":"latest-findings-on-the-impact-of-flu-vaccines-for-seniors","status":"publish","type":"post","link":"https:\/\/scienceinhealth.com\/es\/2025\/01\/09\/latest-findings-on-the-impact-of-flu-vaccines-for-seniors\/","title":{"rendered":"Latest Findings on the Impact of Flu Vaccines for Seniors"},"content":{"rendered":"<p><strong>Puntos clave<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Flu and COVID-19 vaccines can be co-administered safely, offering combined protection during respiratory virus season.<\/li>\n\n\n\n<li>High-dose and adjuvanted flu vaccines significantly reduce hospitalization risks in adults aged 65+, with some studies showing up to a 62% reduction over standard-dose shots.<\/li>\n\n\n\n<li>In the 2024\u201325 season, flu vaccines cut medically attended illness by 51\u201357% and hospitalization rates by 38\u201355% in seniors.<\/li>\n\n\n\n<li>The CDC and ACIP now recommend enhanced vaccines\u2014HD-IIV3, aIIV3, or RIV4\u2014as the preferred options for older adults.<\/li>\n\n\n\n<li>Vaccine uptake among seniors remains inconsistent due to misinformation, access gaps, and disparities.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Por qu\u00e9 esto importa<\/h2>\n\n\n\n<p>Adults aged 65 and older account for 70\u201385% of flu-related deaths and 50\u201370% of hospitalizations, according to the U.S. Centers for Disease Control and Prevention (CDC) (<a class=\"\" href=\"https:\/\/www.cdc.gov\/flu\/highrisk\/65over.htm\">CDC, 2024<\/a>). With aging comes immune system decline, which increases vulnerability to respiratory infections and complicates recovery.<\/p>\n\n\n\n<p>Flu vaccines remain one of the most effective tools to prevent severe outcomes\u2014but not all vaccines are equally effective for seniors.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What\u2019s New in the 2024\u20132025 Season<\/h2>\n\n\n\n<p>New interim data from the CDC\u2019s Influenza Vaccine Effectiveness Network show that for adults 65+, the vaccine reduced:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Medically attended flu illness by 51\u201357%<\/li>\n\n\n\n<li>Hospitalizations by 38\u201355%<br>(<a class=\"\" href=\"https:\/\/www.cdc.gov\/mmwr\/volumes\/74\/wr\/mm7406a2.htm\">CDC, 2025<\/a>)<\/li>\n<\/ul>\n\n\n\n<p>This protection is even more pronounced with enhanced vaccines\u2014high-dose (HD-IIV3) and MF59-adjuvanted (aIIV3) formulations. A large retrospective study of nearly half a million seniors showed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>High-dose vaccine reduced hospitalizations by ~25%<\/li>\n\n\n\n<li>Adjuvanted vaccine cut hospitalizations by ~62%<br>(<a href=\"https:\/\/www.kp-scalresearch.org\/high-dose-and-adjuvanted-flu-vaccines-provided-better-protection-for-seniors\/\">Kaiser Permanente, 2024<\/a>)<\/li>\n<\/ul>\n\n\n\n<p>Though both types outperformed standard-dose vaccines, a 2024 randomized head-to-head study found no significant difference between the high-dose and adjuvanted versions in preventing flu illness (<a href=\"https:\/\/www.cslseqirus.us\/news\/new-data-presented-at-idweek-2024\">CSL Seqirus, 2024<\/a>).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Science Behind Enhanced Vaccines<\/h2>\n\n\n\n<p>Aging affects immune function\u2014a process known as <strong>immunosenescence<\/strong>\u2014leading to a weaker response to traditional flu vaccines. Enhanced vaccines counter this by either:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Increasing antigen dose (e.g., Fluzone High-Dose)<\/li>\n\n\n\n<li>Using an adjuvant, such as MF59, to stimulate a stronger immune response (e.g., Fluad)<\/li>\n<\/ul>\n\n\n\n<p>These tools are essential for helping older immune systems produce adequate protection against the influenza virus.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Updated CDC Recommendations<\/h2>\n\n\n\n<p>As of 2025, the CDC\u2019s Advisory Committee on Immunization Practices (ACIP) recommends that adults aged 65+ receive one of the following flu vaccines:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>HD-IIV3 (High-Dose Inactivated Influenza Vaccine)<\/li>\n\n\n\n<li>aIIV3 (MF59-Adjuvanted Inactivated Influenza Vaccine)<\/li>\n\n\n\n<li>RIV4 (Recombinant Influenza Vaccine)<\/li>\n<\/ul>\n\n\n\n<p>These are preferred over the standard-dose option, though standard vaccines are still acceptable if no enhanced version is available (<a class=\"\" href=\"https:\/\/www.cdc.gov\/mmwr\/volumes\/74\/wr\/mm7402a3.htm\">CDC, 2025 Immunization Schedule<\/a>).<\/p>\n\n\n\n<p><strong><strong><a href=\"http:\/\/scienceinhealth.com\/es\/newsletter\/\" target=\"_blank\" rel=\"noreferrer noopener\">Suscr\u00edbase gratis para obtener art\u00edculos de salud m\u00e1s perspicaces adaptados a sus necesidades.<\/a><\/strong><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Barriers to Access and Uptake<\/h2>\n\n\n\n<p>Despite strong evidence, vaccine uptake among seniors remains far from optimal. CDC data show that only about half of adults over 65 get vaccinated each flu season (AP News, 2024).<\/p>\n\n\n\n<p>Several factors contribute to this:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Misinformation, especially about ingredients like thimerosal<\/li>\n\n\n\n<li>Lack of awareness about enhanced options<\/li>\n\n\n\n<li>Access disparities, particularly in rural and minority communities<\/li>\n<\/ul>\n\n\n\n<p>Recent federal actions to phase out thimerosal from vaccines, though intended to streamline safety protocols, have inadvertently amplified public confusion (<a>BioPharma Dive, 2025<\/a>).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Flu and COVID-19 Vaccine Co-Administration<\/h2>\n\n\n\n<p>The CDC and health professionals now recommend co-administering flu and COVID-19 vaccines, particularly for seniors, to streamline care and ensure seasonal protection. A 2024 AP report emphasized the safety and efficiency of this approach, with no additional risk compared to getting each shot separately (AP News, 2024).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Broader Public Health Impact<\/h2>\n\n\n\n<p>Vaccinating seniors reduces not just flu cases, but also:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Emergency room visits<\/li>\n\n\n\n<li>ICU stays<\/li>\n\n\n\n<li>Long-term recovery times<\/li>\n<\/ul>\n\n\n\n<p>This lowers burdens on caregivers and public systems such as Medicare, while improving quality of life for aging populations.<\/p>\n\n\n\n<p>Modeling by the CDC shows that shifting even 25% more seniors to enhanced vaccines could prevent thousands of hospitalizations annually.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Seniors and Caregivers Can Do<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Ask specifically for Fluzone High-Dose, Fluad, or RIV4 at clinics and pharmacies.<\/li>\n\n\n\n<li>Time your shot ideally in September or October, though later is still better than not at all.<\/li>\n\n\n\n<li>Discuss any concerns with a health professional\u2014particularly regarding ingredients or timing.<\/li>\n\n\n\n<li>Stay current on RSV and COVID-19 vaccine schedules, especially if you\u2019re at high risk.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Fuentes<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>CDC. \u201cPeople 65 Years and Older &amp; Influenza.\u201d <a class=\"\" href=\"https:\/\/www.cdc.gov\/flu\/highrisk\/65over.htm\">cdc.gov<\/a><\/li>\n\n\n\n<li>CDC. \u201cInterim Estimates of 2024\u201325 Seasonal Influenza Vaccine Effectiveness.\u201d <a class=\"\" href=\"https:\/\/www.cdc.gov\/mmwr\/volumes\/74\/wr\/mm7406a2.htm\">cdc.gov<\/a><\/li>\n\n\n\n<li>Kaiser Permanente Southern California Research. <a href=\"https:\/\/www.kp-scalresearch.org\/high-dose-and-adjuvanted-flu-vaccines-provided-better-protection-for-seniors\/\">kp-scalresearch.org<\/a><\/li>\n\n\n\n<li>CSL Seqirus. \u201cIDWeek 2024 Data.\u201d <a href=\"https:\/\/www.cslseqirus.us\/news\/new-data-presented-at-idweek-2024\">cslseqirus.us<\/a><\/li>\n\n\n\n<li>CDC. \u201c2025 Recommended Adult Immunization Schedule.\u201d <a class=\"\" href=\"https:\/\/www.cdc.gov\/mmwr\/volumes\/74\/wr\/mm7402a3.htm\">cdc.gov<\/a><\/li>\n\n\n\n<li>AP News. \u201cDon\u2019t Wait for a Holiday Surge&#8230;\u201d <a href=\"https:\/\/apnews.com\/article\/flu-covid-vaccine-thanksgiving-christmas-c44d008754ef95b78761d218d9ab77da\">apnews.com<\/a><\/li>\n\n\n\n<li>BioPharma Dive. \u201cHHS to Phase Out Thimerosal&#8230;\u201d <a href=\"https:\/\/www.biopharmadive.com\/news\/kennedy-thimerosal-vaccines-hhs-adopt-cdc-recommendation\/753838\/\">biopharmadive.com<\/a><\/li>\n<\/ul>\n\n\n\n<p><em>El art\u00edculo no constituye en modo alguno un consejo m\u00e9dico. Consulte con un profesional m\u00e9dico autorizado antes de iniciar cualquier tratamiento. Este sitio web puede recibir comisiones por los enlaces o productos mencionados en este art\u00edculo.<\/em><\/p>\n\n\n\n<p><strong><a href=\"http:\/\/scienceinhealth.com\/es\/newsletter\/\" target=\"_blank\" rel=\"noreferrer noopener\">Suscr\u00edbase gratis para obtener art\u00edculos de salud m\u00e1s perspicaces adaptados a sus necesidades.<\/a><\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>Key Points Why This Matters Adults aged 65 and older account for 70\u201385% of flu-related deaths and 50\u201370% of&hellip;<\/p>","protected":false},"author":21,"featured_media":294,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,3,11],"tags":[309,308],"class_list":["post-293","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-family-health","category-health-news-trends","category-senior-health","tag-flu-vaccine","tag-flu-vaccines-for-seniors"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Flu Vaccines for Seniors: New Data on Protection &amp; Benefits<\/title>\n<meta name=\"description\" content=\"Discover the latest research on flu vaccine effectiveness for adults 65+. 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