The big steps that saved lives — from cowpox lymph in a country doctor's hand to messenger RNA folded by an algorithm. Two centuries of pushing back against death.
A country physician notices milkmaids don't catch smallpox. He tests a hunch on 8-year-old James Phipps — and invents immunology.
Jenner inoculated a boy with material from a cowpox lesion, then exposed him to smallpox. The boy didn't get sick. The Latin word for cow, vacca, gave the procedure its name. Smallpox would go on to be the only human disease ever eradicated (1980).
Until October 1846, surgery meant being held down, awake, while a surgeon worked as fast as humanly possible.
Morton inhaled diethyl ether through a glass apparatus to a 20-year-old patient named Edward Abbott. Surgeon John Collins Warren removed a neck tumor in silence. Warren turned to the audience and said, "Gentlemen, this is no humbug." Within a year ether crossed the Atlantic.
Surgery was now painless — but post-operative infection killed roughly half of all surgical patients. Then a chemist in Paris and a surgeon in Glasgow connected the dots.
Pasteur's swan-neck flask experiments showed microorganisms cause spoilage and disease — not "spontaneous generation" or bad air. He invented pasteurisation along the way and later developed vaccines for rabies and anthrax.
Reading Pasteur, Lister sprayed carbolic acid in operating theatres and washed instruments. Surgical mortality at his hospital plunged. The mouthwash bearing his name (Listerine) is the small commercial echo.
Working in a darkened lab, the German physicist saw a barium-coated screen glow even with his cathode-ray tube covered. He had stumbled into the first medical imaging.
On 8 November 1895 Röntgen photographed his wife Anna's hand: bones and wedding ring sharply visible through flesh. She reportedly gasped, "I have seen my death." Within weeks the technique was being used in clinics. The first Nobel Prize in Physics (1901) went to him.
A blue-green mould had killed the bacteria around it. Fleming named the substance penicillin. It would take Florey, Chain and a wartime crisis to mass-produce it.
Fleming's accident sat in a journal for a decade. Then Howard Florey and Ernst Chain at Oxford figured out purification; American pharma scaled production for D-Day. Soldiers who would have died from infected wounds in WWI now survived. The trio shared the 1945 Nobel.
In Cambridge, Watson and Crick built models. In London, Rosalind Franklin's X-ray diffraction "Photo 51" handed them the answer.
A one-page paper in Nature proposed a self-copying molecule. It birthed molecular biology, recombinant DNA, the Human Genome Project, CRISPR — and eventually the mRNA vaccines on slide 12. Franklin's contribution was for decades under-credited.
Mid-century parents feared polio more than any other disease. Pools closed. Children appeared in newsreels in iron lungs. Then a Pittsburgh lab made a vaccine.
Salk's 1954 trial was the largest medical experiment in history: 1.8 million "Polio Pioneers." Asked who owned the patent, Salk replied: "There is no patent. Could you patent the sun?" Wild polio is now confined to two countries.
A 9-hour operation in Cape Town moved the heart of a young woman killed in a car crash into the chest of a 53-year-old grocer.
Patient Louis Washkansky lived 18 days; he died of pneumonia, not rejection. The world's press camped outside the hospital. Within years, surgeons everywhere were transplanting hearts, kidneys, livers and lungs. Cyclosporine (1983) made long-term survival routine.
Born 25 July 1978 in Oldham, England, weighing 5 lb 12 oz. The egg had been fertilised in a glass dish in a Cambridge lab.
Edwards spent two decades being denied research funding. The Catholic Church condemned the experiment. The headlines screamed "test-tube baby." Today IVF is mundane medicine. Edwards received the Nobel Prize in 2010 — Steptoe had died, ineligible posthumously.
In the early '80s, a positive HIV test meant a death within years. By the mid-'90s a triple-drug cocktail rewrote the obituary pages.
David Ho's combination therapy reduced HIV in the blood to undetectable levels. Within a couple of years US AIDS deaths halved. Today a person with HIV on treatment has near-normal life expectancy and cannot transmit the virus (U=U).
SARS-CoV-2's genome was published 11 January 2020. Moderna's vaccine sequence was finalised 48 hours later. The first US arms were jabbed on 14 December 2020.
Katalin Karikó and Drew Weissman spent the 1990s and 2000s figuring out how to get synthetic mRNA past the immune system. Their 2005 paper was the seed. In a pandemic year that work paid off — and won them the 2023 Nobel Prize. The platform is now being aimed at flu, RSV, cancer.
Each breakthrough multiplied lifespan and shrank suffering. Global life expectancy in 1800: about 30. In 2024: about 73. The line keeps climbing.