Medicine in Britain, c1900-present: War, Science and the Development of Penicillin
In twentieth-century Britain, war and organised science combined to speed up medical progress far beyond the pace of earlier centuries. In 1928, the bacteriologist Alexander Fleming accidentally discovered that a mould, Penicillium, had killed the bacteria in a contaminated laboratory dish, identifying what would become the first antibiotic, penicillin. For over a decade his discovery remained a laboratory curiosity, because it was too difficult to produce in useful quantities. During the Second World War, the scientists Howard Florey and Ernst Chain led a team that worked out how to purify and mass-produce penicillin, and wartime funding and cooperation, especially from the United States, turned it into a practical, widely available drug by the mid-1940s, saving thousands of wounded soldiers from fatal infections. War also drove other advances in British medicine of this period, including improved blood transfusion services and surgical techniques, because the huge scale of casualties gave doctors both urgent need and, unusually, the resources to innovate quickly.
Before you start
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Method
- Separate DISCOVERY from DEVELOPMENT when writing about penicillin: Fleming discovered penicillin's antibacterial effect in 1928, but it was Florey and Chain's team, working in the 1940s, who worked out how to purify and mass-produce it as a usable drug.
- Learn why the gap between 1928 and the 1940s existed: Fleming lacked the funding, chemical expertise and urgent motivation to develop his discovery further, and it took the crisis and resources of the Second World War to solve the production problems.
- Learn how war acted as a factor pushing medicine forward: huge numbers of wounded soldiers created urgent demand for effective treatments against infection, and wartime governments, especially the United States, funded research and mass production at a scale peacetime rarely matched.
- For 'explain why' questions about penicillin or wartime medicine, treat chance (Fleming's accidental observation), individuals (Fleming, Florey, Chain), science and technology (new chemical purification methods) and war/government funding as separate factors that combined, rather than crediting one person or one moment alone.
- For 'explain one way X was similar to/different from Y' questions comparing this period with an earlier one, use the SPEED of change as your comparison point: unlike Jenner's slow, individual route to vaccination, penicillin needed an entire government-funded wartime research and production programme to reach patients.
- For a 16-mark judgement question on whether war or individuals mattered more, plan a paragraph crediting the individual breakthrough (Fleming's chance discovery) and a paragraph crediting the wider factor (wartime government funding and mass production), then reach a conclusion that explains which was more essential to penicillin actually saving lives.
Worked example
Explain one way in which the development of penicillin was similar to the development of vaccination by Edward Jenner.
- Choose a precise similarity: both began with a chance or accidental observation made by an individual, rather than a planned research programme.
- Support the Jenner side with detail: Jenner noticed milkmaids who had caught cowpox seemed protected from smallpox, an observation that led him to test vaccination in 1796.
- Support the penicillin side with detail: Fleming noticed in 1928 that a mould had accidentally killed bacteria in a contaminated laboratory dish, leading him to identify penicillin's antibacterial effect.
- State the similarity clearly: in both cases, a chance observation by an alert individual was the starting point for a discovery that later needed further work (by other scientists, or by government) before it could help patients on a large scale.
Practice questions
Try each question, then tap to reveal the answer.
Q1Who accidentally discovered penicillin's antibacterial effect, and in what year?Show answer
Answer: Alexander Fleming, in 1928.
Q2What had Fleming noticed in his contaminated laboratory dish?Show answer
Answer: That a mould, Penicillium, had killed the bacteria growing around it.
Q3Name the two scientists who led the team that worked out how to purify and mass-produce penicillin.Show answer
Answer: Howard Florey and Ernst Chain.
Q4In roughly which decade did penicillin become a widely available, mass-produced drug?Show answer
Answer: The 1940s, during and just after the Second World War.
Q5Give one reason Fleming's discovery was not developed into a usable drug straight away.Show answer
Answer: Producing penicillin in large enough quantities and in a pure enough form was extremely difficult, and Fleming lacked the funding, chemical expertise and urgent need to solve this problem on his own.
Q6Give one reason the Second World War helped speed up the development of penicillin.Show answer
Answer: The war created a huge, urgent demand for treatments that could stop wounded soldiers' infections from becoming fatal, and wartime governments, especially the United States, funded and organised the mass production Florey and Chain's team needed.
Exam-style questions
Written in the style of a GCSE History exam paper, with a full mark scheme.
Explain one way in which the role of chance in medical progress in the twentieth century was similar to the role of chance in an earlier period you have studied.
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Explain why penicillin became a widely available treatment by the mid-1940s.
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