Core Insights - Valneva SE has released final immunogenicity and safety data from the Phase 2 study of its Lyme disease vaccine candidate, VLA15, indicating a strong immune response and favorable safety profile six months after a third booster dose [1][2][4] Vaccine Efficacy and Safety - The study demonstrated a robust anamnestic immune response across all age groups, confirming the vaccine's compatibility with the expected benefits of annual vaccination before Lyme season [2][4] - Antibody levels remained significantly higher with a three-dose primary vaccination schedule compared to a two-dose schedule, with geometric mean fold rises (GMFRs) ranging from 9.5-fold for Serotype 1 (ST1) to 15.6-fold for Serotype 2 (ST2) [5][6] - The highest GMFRs were observed in the 5 to 11-year-old age group, with levels ranging from 15.5-fold (ST1) to 28.5-fold (ST2), further validating the three-dose schedule and yearly booster [6] Regulatory Pathway - Pfizer aims to submit a Biologics License Application to the U.S. FDA and a Marketing Authorization Application to the European Medicines Agency in 2026, contingent on positive Phase 3 data [4] Operational Strategy - Valneva announced a strategic initiative to optimize its organizational footprint in France, planning to consolidate operations at its Lyon location and close the Nantes site [7] Market Reaction - Following the announcement, Valneva shares increased by 7.65%, reaching $9.19 [8]

Core Insights - Valneva SE announced positive final immunogenicity and safety data from the Phase 2 study of its Lyme disease vaccine candidate, VLA15, indicating strong immune response and favorable safety six months after a third booster dose, supporting the concept of yearly vaccinations before Lyme season [1][4][6] Company Overview - Valneva SE is a specialty vaccine company focused on developing, manufacturing, and commercializing prophylactic vaccines for infectious diseases, addressing unmet medical needs [9] - The company has advanced multiple vaccines from early R&D to approvals and currently markets three proprietary travel vaccines [10] - Valneva's commercial revenues support the advancement of its vaccine pipeline, including the only Lyme disease vaccine candidate in advanced clinical development, partnered with Pfizer [11] Vaccine Development - VLA15 is the most advanced Lyme disease vaccine candidate, with all vaccinations completed in the pivotal VALOR Phase 3 trial [2] - The vaccine targets the outer surface protein A (OspA) of Borrelia burgdorferi, the bacteria causing Lyme disease, and covers the six most prevalent OspA serotypes in North America and Europe [5] - The Phase 2 study, VLA15-221, included a pediatric population and demonstrated that antibody levels remained well above baseline across all serotypes and age groups six months after the third booster dose [6][7] Market Need - There are currently no approved human vaccines for Lyme disease, with approximately 476,000 cases diagnosed annually in the U.S. and 132,000 cases reported in Europe [2][8] - The geographic expansion of Lyme disease highlights the pressing medical need for vaccination, as early symptoms are often overlooked, leading to serious chronic complications if untreated [8]

Core Insights - Valneva SE announced positive immunogenicity and safety data from the Phase 2 study of its Lyme disease vaccine candidate, VLA15, showing strong immune response and favorable safety profile after a third booster dose [1][3][4] Company Overview - Valneva SE is a specialty vaccine company focused on developing, manufacturing, and commercializing prophylactic vaccines for infectious diseases, addressing unmet medical needs [12] - The company has advanced multiple vaccines from early R&D to approvals and currently markets three proprietary travel vaccines [13] Vaccine Development - VLA15 is the only Lyme disease vaccine candidate in advanced clinical development, with two Phase 3 trials nearing completion [2][6] - The vaccine targets the outer surface protein A (OspA) of Borrelia burgdorferi, the bacteria causing Lyme disease, and aims to inhibit the bacterium's ability to infect humans [6][8] Clinical Study Results - The Phase 2 study (VLA15-221) involved 560 healthy participants aged 5 to 65, demonstrating a 100% seroconversion rate across all age groups after the third booster dose [3][9] - The safety profile after the third booster was consistent with previous doses, with no safety concerns reported by the independent Data Monitoring Committee [4][7] Market Need - There are currently no approved human vaccines for Lyme disease, with approximately 476,000 cases diagnosed annually in the U.S. and 132,000 in Europe, highlighting a significant unmet medical need [2][11] - The geographic expansion of Lyme disease increases the urgency for vaccination solutions [3][11] Collaboration - Valneva has a collaboration agreement with Pfizer for the development and commercialization of VLA15, initiated in April 2020 [4]