The character arc of Katalin Kariko
Born 17 January 1955 in Szolnok, Hungary, and raised in the small town of Kisujszallas, the daughter of a butcher. Between then and now sit a lab that ran out of money, a leaving of Hungary in 1985 with the family's savings hidden in her young daughter's teddy bear, a demotion at the University of Pennsylvania in 1995 for backing messenger RNA when few thought it worth funding, years of rejected grants, the vaccines her science made possible, and the 2023 Nobel Prize. The line below draws the story so far, in order.
Tap the line to pluck it. Hover or tap any mark for its card. Drawn from the public record of her life; the sources are at the foot of the page.
Who is Katalin Kariko?
Told the idea was going nowhere, and she carried it anyway.
She grew up in a home in Kisujszallas without running water, the daughter of a butcher, and decided early that she wanted to do research. She earned her doctorate at the University of Szeged, but in 1985 the funding for her research post ran out. So she sold the family car, hid the proceeds, around nine hundred pounds, inside her daughter's teddy bear because taking money out of the country was not allowed, and left Hungary for a job in the United States. That is where the long climb begins, though for a long time it did not look like a climb at all.
She staked her career on messenger RNA, the molecule that carries the body's instructions, believing it could be turned into medicine. Almost nobody agreed. Grant application after grant application was rejected, and in 1995 the University of Pennsylvania demoted her, cut her pay, and took her off the path to a professorship, all in the same stretch of years she was also facing a serious illness. She stayed and kept working at the lower rank. A chance meeting at a department photocopier in the late 1990s paired her with the immunologist Drew Weissman, and in 2005 the two of them published the finding that solved the problem everyone else had walked away from: a small change to the molecule stopped the body from rejecting it. The paper was turned down by the biggest journals first, and then largely ignored.
When the pandemic came, that ignored finding was the thing the mRNA vaccines were built on, and they reached billions of people. In 2023 she and Weissman were awarded the Nobel Prize in Physiology or Medicine. She has said, in her memoir Breaking Through, that she never took the rejections personally and treated each closed door as a problem to solve rather than a verdict on her. Her line is worth reading because the demotion that was meant to end her career is the reason the work survived to matter.
The moments
Katalin Kariko's timeline.
The 1980s
Doctorate from Szeged
Milestone. She had wanted to do research since childhood. The degree was the start of a working life in the lab.
Her lab lost its funding
Setback, and it changed her direction. The money for her position dried up. To keep doing science, she would have to leave the country.
Stay in Hungary, or leave
Crossroads, decided.
The paths laid out: leave for the United States, taken, or stay and find other work. The leaving put her in the lab where, decades later, the ignored work became the basis of the mRNA vaccines and the 2023 Nobel Prize.
Left Hungary for good
Milestone, and it changed everything. She sold the car and hid the money, around nine hundred pounds, in her daughter's teddy bear, because taking it out openly was barred.
Joined Penn for mRNA
Milestone. She bet her career on a molecule most of the field thought was a dead end.
The 1990s
Demoted at Penn
Setback, and it changed everything. Cut in rank and pay for backing mRNA, in the same years she also faced a serious illness. She stayed and kept working.
A meeting at the copier
Milestone, and it changed her direction. A chance conversation at a department photocopier began the partnership that would solve the problem.
Grant after grant rejected
Setback, and it changed her direction. Years of no, from the bodies that fund science. She kept applying and kept working at the bench.
The 2000s
The mRNA breakthrough
Milestone, and it changed everything. A small change to the molecule stopped the body rejecting it. The big journals passed, and the paper was then largely ignored.
The 2010s
Left Penn for BioNTech
Milestone, and it changed her direction. She left academia for a small German firm few had heard of, to build medicine from her idea.
The 2020s
The vaccines reached the world
Milestone, and it changed everything. The finding once ignored became the basis of vaccines given to billions of people.
The Lasker Award
Milestone. One of the highest honours in medicine, and a sign that the long-doubted work was now understood.
The Nobel Prize
Milestone, and it changed everything. The prize for the nucleoside discoveries that enabled the mRNA vaccines. Decades of rejection ended at the top of her field.
Her memoir, Breaking Through
Milestone. She set down the whole climb in her own words, and it became a best-selling book in Hungary that year.
Elected to three academies
Milestone. A rare recognition across science, medicine and engineering, seven decades into a life spent in the lab.
The line reaches today still adding to itself, which is why it is drawn now rather than at the end. What it has set moving is already everywhere: the people alive because of a vaccine, and everyone told their idea was going nowhere who decided to carry it anyway.
Your turn
Every story draws a unique line.
Hers is seven decades in and still adding honours. Yours is already further along than you think, and drawing it takes about three minutes.
Sources
- Katalin Kariko, Breaking Through: My Life in Science, 2023.
- The Nobel Prize in Physiology or Medicine 2023, NobelPrize.org (facts and press release).
- Kariko and Weissman, Suppression of RNA Recognition by Toll-like Receptors, Immunity, August 2005.
- Katalin Kariko, English Wikipedia biography.
- Katalin Kariko, Britannica biography.
- University of Szeged news (u-szeged.hu), 2026.