120+ Years of Recognizing Medicine's Biggest Ideas
The first Nobel Prize in Physiology or Medicine was awarded in 1901 to Emil von Behring, for developing a serum therapy against diphtheria — a disease that had killed enormous numbers of children throughout the 19th century. In the decades that followed, the prize tracked medicine's biggest turning points almost like a running index: Ivan Pavlov won in 1904 for research on digestive physiology (not, contrary to popular belief, specifically for the classical conditioning experiments with dogs he's best remembered for today), Robert Koch won in 1905 for identifying the bacterium that causes tuberculosis, and Paul Ehrlich shared the 1908 prize for foundational work on immunity.
Karl Landsteiner discovered the ABO blood group system in 1901, a finding that made safe blood transfusion possible for the first time — but the Nobel committee didn't recognize the work until 1930, a reminder that Nobel recognition often lags a discovery's actual impact by decades. Alexander Fleming shared the 1945 prize with Howard Florey and Ernst Chain for penicillin, and James Watson, Francis Crick, and Maurice Wilkins shared the 1962 prize for the structure of DNA.
Unconventional Wins, and the Prizes Never Given
Some of the most interesting Nobel stories involve doctors proving a point about their own field. In 2005, Barry Marshall and Robin Warren won for discovering that most stomach ulcers are caused by the bacterium Helicobacter pylori, not stress or spicy food as doctors had assumed for decades. When the medical establishment resisted his findings, Marshall famously drank a petri dish of the bacteria himself, developed gastritis, and then cured it with antibiotics — a self-experiment that helped force a rewrite of standard medical teaching. In 2012, Shinya Yamanaka won for discovering how to reprogram adult cells into induced pluripotent stem cells, capable of becoming almost any cell type in the body, without the ethical controversy surrounding embryonic stem cells.
Just as notable are the achievements the Nobel Prize never recognized. Christiaan Barnard, who performed the world's first human heart transplant in 1967, never received one — the prize tends to reward the discovery of an underlying scientific principle rather than a surgical first, however historic. Rosalind Franklin, whose X-ray diffraction images were essential to discovering DNA's structure, died in 1958, four years before Watson, Crick, and Wilkins were honored for that work in 1962; Nobel Prizes are never awarded posthumously, so she was never eligible regardless of her contribution. The Nobel rules also cap each prize at three living recipients, which has forced difficult exclusions whenever a discovery involved a larger team.
The prize's history includes its share of controversy, too. Portuguese neurologist António Egas Moniz shared the 1949 prize for developing the prefrontal lobotomy, a procedure now widely regarded as one of the more troubling chapters in 20th-century medicine and a decision the Nobel committee itself has faced repeated calls to revisit. Studying the full list of laureates, in other words, is really studying a very particular, very human process for deciding whose name gets remembered — and whose work looks very different in hindsight than it did at the time.
Source: The Nobel Prize official site and Encyclopaedia Britannica.