Katalin Karikó and Drew Weissman, Penn’s historic mRNA vaccine research team, win 2023 Nobel Prize in Medicine
The highest honor was bestowed for foundational discoveries that gave the world a vaccine to fight the COVID-19 pandemic.
Katalin Karikó and Drew Weissman are the recipients of the 2023 Nobel Prize in Medicine.
The University of Pennsylvania messenger RNA pioneers whose years of scientific partnership unlocked an understanding of how to modify mRNA to make it an effective therapeutic—enabling a platform used to rapidly develop lifesaving vaccines amid the global COVID-19 pandemic—have been named winners of the 2023 Nobel Prize in Physiology or Medicine. They become the 28th and 29th Nobel laureates affiliated with Penn, and join nine previous Nobel laureates with ties to the University of Pennsylvania who have won the Nobel Prize in Medicine.
Nearly three years after the rollout of mRNA vaccines across the world, Katalin Karikó, an adjunct professor of neurosurgery in Penn’s Perelman School of Medicine, and Drew Weissman, the Roberts Family Professor of Vaccine Research in the Perelman School of Medicine, are recipients of the prize announced this morning by the Nobel Assembly in Solna, Sweden.
After a chance meeting in the late 1990s while photocopying research papers, Karikó and Weissman began investigating mRNA as a potential therapeutic. In 2005, they published a key discovery: mRNA could be altered and delivered effectively into the body to activate the body’s protective immune system. The mRNA-based vaccines elicited a robust immune response, including high levels of antibodies that attack a specific infectious disease that has not previously been encountered. Unlike other vaccines, a live or attenuated virus is not injected or required at any point.
When the COVID-19 pandemic struck, the true value of the pair’s lab work was revealed in the most timely of ways, as companies worked to quickly develop and deploy vaccines to protect people from the virus. Both Pfizer/BioNTech and Moderna utilized Karikó and Weissman’s technology to build their highly effective vaccines to protect against severe illness and death from the virus. In the United States alone, mRNA vaccines make up more than 655 million total doses of SARS-CoV-2 vaccines that have been administered since they became available in December 2020.
Katalin Karikó, an adjunct professor of neurosurgery in the Perelman School of Medicine, and Drew Weissman, the Roberts Family Professor of Vaccine Research in the Perelman School of Medicine.
“Katalin Karikó and Drew Weissman are brilliant researchers who represent the epitome of scientific inspiration and determination. Day after day, Dr. Weissman, Dr. Karikó and their teams worked tirelessly to unlock the power of mRNA as a therapeutic platform, not knowing the way in which their work could serve to meet a big challenge the world would one day face,” said Penn President Liz Magill. “With the truest devotion to their field, they’ve already promised they will not stop here, and that is the greatest inspiration of all. Our Penn community is enormously proud of their groundbreaking achievements and this well-deserved recognition.”
“The phrase Nobel Prize elicits images of individuals whose work has, without exaggeration, changed the world,” said J. Larry Jameson, executive vice president of the University of Pennsylvania for the Health System and Dean of the Perelman School of Medicine. “During the biggest public health crisis of our lifetimes, vaccine developers relied upon the discoveries by Dr. Weissman and Dr. Karikó, which saved innumerable lives and paved a path out of the pandemic. Now, the same approach is being tested for other diseases and conditions. More than 15 years after their visionary laboratory partnership, Kati and Drew have made an everlasting imprint on medicine.”
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Since 1901, the Nobel Foundation has awarded prizes to those whose breakthroughs “have conferred the greatest benefit to humankind.” Prizes are bestowed to laureates whose work relates to the areas of physics, chemistry, physiology or medicine, literature, peace, and economics. Fewer than 1,000 people have received a Nobel Prize, and only 225 people have previously been awarded one in Physiology or Medicine. Karikó, who is also a professor at the University of Szeged in Hungary, is only the 61st woman to ever be named a Nobel Laureate.
Editor’s Note:The Pfizer/BioNTech and Moderna COVID-19 mRNA vaccines both use licensed University of Pennsylvania technology. As a result of these licensing relationships, Penn, Karikó, and Weissman have received and may continue to receive significant financial benefits in the future based on the sale of these products. BioNTech provides funding for Weissman’s research into the development of additional infectious disease vaccines.
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