{"id":3111,"date":"2026-06-29T14:29:57","date_gmt":"2026-06-29T07:29:57","guid":{"rendered":"https:\/\/naviva.com.vn\/?p=3111"},"modified":"2026-07-29T09:41:08","modified_gmt":"2026-07-29T02:41:08","slug":"stability-of-the-second-generation-mav-06-varicella-vaccine-barycela-translating-scientific-evidence-into-immunization-practice","status":"publish","type":"post","link":"https:\/\/naviva.com.vn\/en\/stability-of-the-second-generation-mav-06-varicella-vaccine-barycela-translating-scientific-evidence-into-immunization-practice","title":{"rendered":"Stability of the Second-Generation MAV\/06 Varicella Vaccine \u2013 BARYCELA: Translating Scientific Evidence into Immunization Practice"},"content":{"rendered":"<p><span style=\"font-weight: 400; font-size: 14pt; font-family: 'times new roman', times, serif; color: #000000;\">For live attenuated vaccines, stability is a critical quality attribute that helps ensure product integrity throughout storage, transportation, and administration. Because live viruses may gradually lose potency over time or when exposed to suboptimal storage conditions, maintaining vaccine stability is essential to preserving product quality.<\/span><\/p>\n<p><span style=\"font-size: 14pt; font-family: 'times new roman', times, serif; color: #000000;\"><span style=\"font-weight: 400;\">The second-generation <\/span><b>MAV\/06 varicella vaccine \u2013 BARYCELA<\/b><span style=\"font-weight: 400;\"> has been developed with advanced manufacturing technologies and is supported by robust stability data.<\/span><\/span><\/p>\n<p><a href=\"https:\/\/naviva.com.vn\/wp-content\/uploads\/2025\/11\/vac-xin-thuy-dau-barycela-4.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2427\" src=\"https:\/\/naviva.com.vn\/wp-content\/uploads\/2025\/11\/vac-xin-thuy-dau-barycela-4.png\" alt=\"\" width=\"3924\" height=\"2900\" srcset=\"https:\/\/naviva.com.vn\/wp-content\/uploads\/2025\/11\/vac-xin-thuy-dau-barycela-4.png 3924w, https:\/\/naviva.com.vn\/wp-content\/uploads\/2025\/11\/vac-xin-thuy-dau-barycela-4-300x222.png 300w, https:\/\/naviva.com.vn\/wp-content\/uploads\/2025\/11\/vac-xin-thuy-dau-barycela-4-648x479.png 648w, https:\/\/naviva.com.vn\/wp-content\/uploads\/2025\/11\/vac-xin-thuy-dau-barycela-4-768x568.png 768w, https:\/\/naviva.com.vn\/wp-content\/uploads\/2025\/11\/vac-xin-thuy-dau-barycela-4-1600x1182.png 1600w, https:\/\/naviva.com.vn\/wp-content\/uploads\/2025\/11\/vac-xin-thuy-dau-barycela-4-160x118.png 160w\" sizes=\"auto, (max-width: 3924px) 100vw, 3924px\" \/><\/a><\/p>\n<p style=\"text-align: center;\"><i><span style=\"font-weight: 400;\">Image: BARYCELA Varicella Vaccine<\/span><\/i><\/p>\n<h2><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><b>Maintains a Minimum Potency of 3,800 PFU Throughout Its Shelf Life<\/b><\/span><\/h2>\n<p><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><span style=\"font-weight: 400;\">BARYCELA maintains a minimum potency of <\/span><b>3,800 Plaque Forming Units (PFU)<\/b><span style=\"font-weight: 400;\"> throughout its <\/span><b>24-month shelf life<\/b><span style=\"font-weight: 400;\">. This minimum potency is higher than that specified for certain Oka-strain varicella vaccines currently used worldwide (1).<\/span><\/span><\/p>\n<p>&nbsp;<\/p>\n<table>\n<tbody>\n<tr>\n<td><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><b>\u00a0<\/b><\/span><\/td>\n<td><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><b>Second-generation MAV\/06<\/b><\/span><\/td>\n<td><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><b>Oka\/Merck<\/b><\/span><\/td>\n<td><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><b>Oka\/RIT<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><b>Shell Life<\/b><\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">24 months<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">24 months<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">24 months<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><b>Minimum PFU<\/b><\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">3800<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">1350<\/span><\/td>\n<td><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">1995<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><b>Table. Comparison of minimum PFU values among varicella vaccines<\/b><\/span><\/p>\n<p><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><span style=\"font-weight: 400;\">In a multicenter Phase III clinical study, BARYCELA demonstrated <\/span><b>non-inferior immunogenicity and a comparable safety profile<\/b><span style=\"font-weight: 400;\"> to the Oka\/Merck varicella vaccine following vaccination (2).<\/span><\/span><\/p>\n<h2><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><b>Stability Data Under Storage at 15\u00b0C for 28 Days<\/b><\/span><\/h2>\n<p><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">According to manufacturer stability studies, BARYCELA was stored under the following conditions:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><span style=\"font-weight: 400;\">Temperature: <\/span><b>15 \u00b1 2\u00b0C<\/b><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><span style=\"font-weight: 400;\">Relative humidity: <\/span><b>65 \u00b1 5%<\/b><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">Protected from light<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><span style=\"font-weight: 400;\">Continuous storage for <\/span><b>28 days<\/b><span style=\"font-weight: 400;\"> (2)<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><span style=\"font-weight: 400;\">The study demonstrated that all critical quality attributes remained within predefined acceptance criteria through <\/span><b>Day 28<\/b><span style=\"font-weight: 400;\">, including:<\/span><\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">Appearance<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">Moisture content<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">Product uniformity<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">Viral identity<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">Viral content (potency)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">pH<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">Sterility<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><span style=\"font-weight: 400;\">Although viral potency showed a gradual decline during storage at <\/span><b>15\u00b0C<\/b><span style=\"font-weight: 400;\">, all study batches continued to comply with the approved product quality specifications throughout the evaluation period (1).<\/span><\/span><\/p>\n<p><a href=\"https:\/\/naviva.com.vn\/wp-content\/uploads\/2026\/06\/tinh-on-dinh-cua-barycela.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-3045\" src=\"https:\/\/naviva.com.vn\/wp-content\/uploads\/2026\/06\/tinh-on-dinh-cua-barycela.png\" alt=\"\" width=\"1536\" height=\"1024\" srcset=\"https:\/\/naviva.com.vn\/wp-content\/uploads\/2026\/06\/tinh-on-dinh-cua-barycela.png 1536w, https:\/\/naviva.com.vn\/wp-content\/uploads\/2026\/06\/tinh-on-dinh-cua-barycela-300x200.png 300w, https:\/\/naviva.com.vn\/wp-content\/uploads\/2026\/06\/tinh-on-dinh-cua-barycela-648x432.png 648w, https:\/\/naviva.com.vn\/wp-content\/uploads\/2026\/06\/tinh-on-dinh-cua-barycela-768x512.png 768w, https:\/\/naviva.com.vn\/wp-content\/uploads\/2026\/06\/tinh-on-dinh-cua-barycela-160x107.png 160w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/a><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: 'times new roman', times, serif;\"><i><span style=\"font-weight: 400;\">Image: Vaccine stability \u2014 an essential factor in ensuring product quality.<\/span><\/i><\/span><\/p>\n<h2><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><b>Relevance to Immunization Practice<\/b><\/span><\/h2>\n<p><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">Maintaining the vaccine cold chain remains a fundamental requirement for all vaccination providers. However, the available stability data indicate that BARYCELA maintains its quality under the evaluated storage conditions, providing additional scientific support for vaccine quality management and quality assurance throughout routine immunization practice.<\/span><\/p>\n<p><span style=\"font-weight: 400; color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\">For healthcare professionals, these findings offer further scientific evidence regarding the product&#8217;s characteristics, reinforcing confidence in vaccine quality from manufacturing and distribution through to clinical use.<\/span><\/p>\n<h2><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><b>From Scientific Evidence to Clinical Practice<\/b><\/span><\/h2>\n<p><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><span style=\"font-weight: 400;\">In addition to Phase III clinical evidence demonstrating <\/span><b>non-inferior immunogenicity compared with Varivax<\/b><span style=\"font-weight: 400;\">, stability studies of the second-generation <\/span><b>MAV\/06 varicella vaccine<\/b><span style=\"font-weight: 400;\"> further reflect the manufacturer&#8217;s commitment to product quality.<\/span><\/span><\/p>\n<p><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><span style=\"font-weight: 400;\">The ability to maintain a minimum potency of <\/span><b>3,800 PFU<\/b><span style=\"font-weight: 400;\"> throughout the product&#8217;s shelf life, together with supportive stability data, represents important evidence supporting the quality of the vaccine before it reaches healthcare providers and vaccine recipients.<\/span><\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"color: #000080; font-size: 14pt; font-family: 'times new roman', times, serif;\"><b>NAVIVA GROUP<\/b><\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"color: #ff0000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><i><span style=\"font-weight: 400;\">&#8220;Community Health Is Our Happiness.&#8221;<\/span><\/i><\/span><\/p>\n<p><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><b>Contact Information:<\/b><\/span><\/p>\n<p><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><span style=\"color: #ff0000;\"><b>NAM HUNG VIET<\/b><\/span><b> Vaccine &amp; Biological Products Joint Stock Company<\/b><b><br \/>\n<\/b><span style=\"font-weight: 400;\">Address: No. 89, Nguyen Thi Thap Street, Him Lam Area, Tan Hung Ward, Ho Chi Minh City<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Phone: 028 2223 2425<\/span><\/span><\/p>\n<p><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><span style=\"color: #ff0000;\"><b>TUONG KHUE<\/b><\/span><b> Pharmaceutical Joint Stock Company<\/b><b><br \/>\n<\/b><span style=\"font-weight: 400;\"> Address: 33 Le Lai Street, Hai Chau Ward, Da Nang City<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> Phone: 0236 3538 666<\/span><\/span><\/p>\n<p><span style=\"color: #000000; font-size: 14pt; font-family: 'times new roman', times, serif;\"><span style=\"color: #ff0000;\"><b>WINBIO<\/b><\/span><b> Joint Stock Company<\/b><b><br \/>\n<\/b><span style=\"font-weight: 400;\"> Address: K7TT1 &#8211; SH19, Starlake Urban Area, Xuan Dinh Ward, Hanoi Capital<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> Phone: 024 3795 6789<\/span><\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>For live attenuated vaccines, stability is a critical quality attribute that helps ensure product integrity throughout storage, transportation, and administration. Because live viruses may gradually lose potency over time or when exposed to suboptimal storage conditions, maintaining vaccine stability is essential to preserving product quality. The second-generation MAV\/06 varicella vaccine \u2013 BARYCELA has been developed [&hellip;] <\/p>\n","protected":false},"author":4,"featured_media":3045,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[25],"tags":[],"class_list":["post-3111","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/naviva.com.vn\/en\/wp-json\/wp\/v2\/posts\/3111","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/naviva.com.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/naviva.com.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/naviva.com.vn\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/naviva.com.vn\/en\/wp-json\/wp\/v2\/comments?post=3111"}],"version-history":[{"count":1,"href":"https:\/\/naviva.com.vn\/en\/wp-json\/wp\/v2\/posts\/3111\/revisions"}],"predecessor-version":[{"id":3112,"href":"https:\/\/naviva.com.vn\/en\/wp-json\/wp\/v2\/posts\/3111\/revisions\/3112"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/naviva.com.vn\/en\/wp-json\/wp\/v2\/media\/3045"}],"wp:attachment":[{"href":"https:\/\/naviva.com.vn\/en\/wp-json\/wp\/v2\/media?parent=3111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/naviva.com.vn\/en\/wp-json\/wp\/v2\/categories?post=3111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/naviva.com.vn\/en\/wp-json\/wp\/v2\/tags?post=3111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}