Medicine stands still: about 1000–1500
Ideas about cause: most doctors trusted ancient Greek writers Hippocrates and Galen. They taught the four humours (blood, phlegm, yellow bile, black bile). Illness = humours out of balance. Many people also blamed God, sin, the stars or miasma (bad air).
Treatment: bleeding, purging, herbal remedies, prayer and pilgrimage. Monasteries and early hospitals cared for the sick more than they cured.
Why little change? The Church controlled learning and supported Galen; dissection was rare; there were no microscopes.
Elsewhere: scholars in the Islamic world such as Ibn Sina wrote huge medical books, and older Indian (Sushruta) and Chinese traditions had skilled surgery and herbal medicine.
Public health: towns had dirty streets and water. The Black Death (1348) killed perhaps a third of Europe; people blamed bad air or God and used prayer, flight and quarantine.
The beginnings of change: Renaissance to 1800
- Vesalius (1543) dissected bodies and published accurate drawings, proving Galen wrong in places.
- Harvey (1628) showed the heart pumps blood round the body in a loop.
- The printing press spread new ideas fast; the Royal Society and similar groups shared experiments.
- Jenner (1796) used cowpox to protect against smallpox: the first vaccine. Many opposed it, but in 1980 smallpox was wiped out worldwide.
Daily treatment still changed slowly: new ideas did not yet give new cures.
A revolution in medicine: 1800–1900
Germ theory
Pasteur (1861) proved microbes cause decay; Koch found the germs of anthrax, TB and cholera and stained them under the microscope. Now doctors could aim at a cause.
Surgery
- Pain: ether and chloroform (1846–47) made patients unconscious.
- Infection: Lister (1867) used carbolic acid spray: antiseptic surgery; later aseptic (germ-free) theatres, gloves and steam-cleaned tools.
- Bleeding: blood groups (1901) made transfusions safe.
Public health
John Snow (1854) mapped cholera cases around one water pump and showed the disease came from dirty water. Governments then built sewers and clean water supplies and passed public-health laws.
Modern medicine: 1900 to today
- Magic bullets and antibiotics: Fleming spotted penicillin (1928); Florey and Chain mass-produced it in the 1940s, helped by war funding.
- War and technology: world wars pushed X-ray units, blood banks, plastic surgery and skin grafts. Later came keyhole surgery, transplants and robots.
- Science: DNA structure (1953) and the human genome (2003) led to gene tests and new medicines; mRNA vaccines were made in under a year (2020).
- Public health: many governments created free or low-cost health systems, vaccination drives and health campaigns (for example national immunisation and polio campaigns; India was declared polio-free in 2014).
- New problems: antibiotic resistance, lifestyle diseases and pandemics.
Factors: what speeds up or slows down change
| Factor | Helped | Hindered |
|---|---|---|
| Individuals | Pasteur, Lister, Fleming | Some doctors rejecting new ideas |
| Science and technology | microscope, printing, X-rays | no tools to see germs before 1800s |
| Religion and tradition | care in monasteries | support for Galen; limits on dissection |
| Government | sewers, health laws, free care | "leave it alone" ideas in early 1800s |
| War | surgery, blood banks, penicillin funding | destruction, lost knowledge |
In exams you often explain why a change happened, or how far one factor mattered. Always link a factor to a named example.
Key formulas and definitions
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Worked examples
1. Why did medieval doctors bleed patients?
They believed illness came from too much of one humour, often blood. Letting blood out was meant to restore balance. It did not cure and often made patients weaker.
2. Explain one reason why Vesalius did not quickly improve treatment.
He corrected anatomy, but knowing the body's structure did not explain what causes disease, so doctors still had no new cures. Many also still trusted Galen.
3. How did John Snow prove cholera spread through water?
He marked every cholera death on a street plan. The deaths clustered round one water pump. When the pump handle was removed, cases dropped. This linked the disease to water, not bad air.
4. Lister's antiseptic method cut deaths after surgery. Why did some surgeons resist it?
Carbolic spray stung skin and slowed operations; germ theory was new and not all surgeons believed it; changing old habits takes time.
5. How did war help the development of penicillin?
Fleming found it in 1928 but could not make much. In the Second World War, governments needed medicine for wounded soldiers, so they paid for factories to mass-produce it. War gave money and urgency.
6. "Individuals were the most important factor in medical change." How far do you agree? (plan)
Agree: Pasteur, Lister and Fleming made key discoveries. But: they needed technology (microscopes), communication (journals), governments (funding, laws) and war (penicillin production). Judgement: individuals started changes, but other factors made them spread; give named examples for each side.
Common mistakes
- Saying Fleming alone made penicillin a medicine. He discovered it; Florey and Chain, with war funding, turned it into mass-produced medicine.
- Mixing up antiseptic (killing germs on the wound) and aseptic (keeping germs out in the first place).
- Thinking miasma theory was useless. It was wrong, but cleaning streets to remove smells did reduce disease.
- Writing a list of facts with no factor. Exam answers should explain why change happened and link factors to examples.