Katalin Karikó

Katalin Karikó is the 2023 Nobel Laureate in Physiology or Medicine whose decades of tenacious, underfunded, and widely dismissed research into messenger RNA became the scientific foundation for the COVID-19 vaccines that protected hundreds of millions of lives. A Hungarian-born biochemist, Professor at the University of Szeged, and Adjunct Professor of Neurosurgery at the University of Pennsylvania, she holds 14 U.S. patents and has received over 130 international awards — a record that stands in remarkable contrast to the years she spent battling institutional skepticism in windowless labs with no grant funding and no academic security.

Nobel Prize speaker Katalin Karikó is best known for a 2005 breakthrough she achieved alongside immunologist Drew Weissman: the discovery that chemically modifying mRNA’s nucleoside building blocks — substituting pseudouridine for uridine — rendered the molecule non-inflammatory and stable enough to function as a therapeutic agent. This solved the critical obstacle that had blocked mRNA medicine for decades. Their technology was subsequently licensed to BioNTech and Moderna, and when the genetic sequence of SARS-CoV-2 was published in January 2020, it took BioNTech’s scientists mere hours — working on the foundation Karikó had built over thirty years — to design the first mRNA COVID-19 vaccine candidate. The resulting vaccines demonstrated over 90% efficacy and, within their first year of deployment, are estimated to have prevented more than 14 million deaths worldwide.

Her journey to that achievement is as compelling as the science itself. Growing up the daughter of a butcher in a small Hungarian town with no running water or refrigerator, Karikó earned her PhD at the University of Szeged and immigrated to the United States in 1985 with $1,200 sewn into her daughter’s teddy bear. She faced demotion at the University of Pennsylvania, threats of deportation from a supervisor, repeated grant rejections, and years of professional marginalization — all while remaining absolutely convinced that mRNA would one day transform medicine.

A New Era for mRNA Medicine

The COVID-19 vaccines were not the endpoint but the proof of concept. mRNA technology is now advancing in clinical trials for cancer immunotherapy, influenza, cardiovascular disease, and a range of other conditions. Karikó — elected to the U.S. National Academy of Sciences in 2025 and named to the BBC’s 100 Women list in 2024 — continues to champion this next wave of mRNA therapeutics. Her bestselling memoir, Breaking Through: My Life in Science, has been translated into more than nine languages and praised by Bill Gates as a story that inspires scientists and non-scientists alike.

As a speaker, Katalin Karikó delivers something rare on the keynote stage: Nobel-level scientific authority combined with one of the most human, relatable stories in modern science. Her talks speak directly to leaders, researchers, entrepreneurs, and anyone who has ever believed in an idea the world wasn’t ready for yet. Audiences leave with a clear-eyed understanding of what mRNA medicine means for the future of healthcare — and with the kind of personal resilience framework that only comes from someone who spent thirty years being told she was wrong, and proved otherwise.