GlaxoSmithKline ((GSK)), GlaxoSmithKline plc (UK) ((GB:GSK)) announced an update on their ongoing clinical study.
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GlaxoSmithKline (GSK) has recently completed a Phase 1/2 clinical study titled ‘A Phase 1/2, Randomized, Controlled Study to Evaluate the Reactogenicity, Safety, and Immunogenicity of an Investigational Flu Seasonal/SARS-CoV-2 Combination mRNA Vaccine in Adults.’ The study aimed to assess the safety and immune response of a combined flu and COVID-19 mRNA vaccine in healthy adults, marking a significant step in vaccine innovation.
The intervention tested was a combination mRNA vaccine targeting multiple flu strains and the SARS-CoV-2 spike protein. This vaccine, administered in various dosages and combinations, was compared against licensed vaccines and placebos to evaluate its effectiveness and safety.
The study was designed as a randomized, controlled trial with a parallel intervention model. It was triple-masked, meaning the participants, investigators, and outcomes assessors were blinded to the interventions. The primary purpose was prevention, focusing on the vaccine’s potential to prevent flu and COVID-19.
The study began on November 11, 2024, with its primary completion and last update recorded on July 8, 2025. These dates are crucial as they mark the timeline for data collection and analysis, impacting the potential market release of the vaccine.
This update could positively influence GSK’s stock performance by showcasing their innovative approach in vaccine development, potentially boosting investor confidence. In the competitive vaccine market, advancements like this could position GSK as a leader in combination vaccines, particularly as flu and COVID-19 continue to pose global health challenges.
The study is completed, with further details available on the ClinicalTrials portal.