Published by Global Banking & Finance Review®
Posted on April 3, 2025
2 min readLast updated: January 24, 2026
Add as preferred source on GoogleGSK and Pfizer have settled a patent lawsuit over RSV vaccines, dismissing the case with prejudice. GSK alleged Pfizer's vaccine infringed its patents.
By Blake Brittain
(Reuters) -British pharmaceutical giant GlaxoSmithKline and rival Pfizer have agreed to end a lawsuit that alleged Pfizer's respiratory syncytial virus (RSV) vaccine Abrysvo violated GSK's patent rights in its competing RSV shot Arexvy, according to a Thursday filing in Delaware federal court.
GSK and Pfizer said in the filing that they would dismiss the case with prejudice, which means it cannot be refiled. Spokespeople for the companies did not immediately respond to requests for comment and more information, including whether the case was settled.
GSK, Pfizer and Moderna have developed RSV shots approved by the U.S. Food and Drug Administration, with GSK's Arexvy responsible for the majority of U.S. RSV vaccine sales. The respiratory disease typically causes cold-like symptoms, but it is also a leading cause of pneumonia in toddlers and older adults.
GSK sued Pfizer in 2023, arguing that the New York-based company's vaccine infringed GSK patents related to antigen technology. GSK said in the lawsuit that Pfizer began working on its RSV program around 2013, at least seven years after GSK began developing its shot.
Pfizer denied the allegations and argued GSK's patents were invalid. It convinced a London court to invalidate related UK patents owned by GSK in a separate case last year.
GSK has also sued Pfizer for patent infringement in the U.S. over technology in Pfizer's blockbuster COVID-19 vaccine Comirnaty. That case is still ongoing.
(Reporting by Blake Brittain in Washington; Editing by David Bario and Sandra Maler)
The main topic is the resolution of a patent lawsuit between GSK and Pfizer over RSV vaccines.
GSK alleged that Pfizer's RSV vaccine infringed on its patent rights, leading to a legal dispute.
The lawsuit was settled with prejudice, meaning it cannot be refiled.
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