Edward Jenner and Vaccination

Edward Jenner (1749--1823) was an English country doctor who developed the world's first vaccine. His discovery of vaccination against smallpox in 1796 was one of the most important breakthroughs in the history of medicine and would eventually lead to the eradication of the disease in 1980.

---

Smallpox: The Killer Disease

Smallpox was one of the deadliest diseases in 18th-century Britain.

Fact	Detail
Symptoms	High fever, vomiting, and a rash of fluid-filled blisters (pustules) that left permanent scars
Mortality rate	Around 20--30% of those infected died
Scale	Killed approximately 400,000 Europeans per year in the 18th century
Survivors	Often left blind or severely scarred

---

Inoculation Before Jenner

Before Jenner, the main method of protection was inoculation (also called variolation).

• Material from a smallpox pustule was scratched into the skin of a healthy person.
• This usually caused a mild case of smallpox, after which the person was immune.
• Lady Mary Wortley Montagu brought the practice to Britain from Turkey in 1721.

Advantages	Disadvantages
Often provided immunity	Some patients developed full smallpox and died (2--3% mortality rate)
Cheaper than treating smallpox	Inoculated people could spread the disease to others
Widely practised by the mid-18th century	Not universally available or trusted

---

Jenner's Discovery

Jenner observed that milkmaids who had caught cowpox (a mild disease from cows) seemed to be immune to smallpox. He decided to test this theory scientifically.

The Experiment (1796)

1. Jenner took pus from a cowpox blister on the hand of a milkmaid named Sarah Nelmes.
2. He scratched the pus into the arm of an 8-year-old boy named James Phipps.
3. Phipps developed a mild fever but recovered quickly.
4. Six weeks later, Jenner inoculated Phipps with smallpox material.
5. Phipps did not develop smallpox --- he was immune.

Jenner called his method vaccination, from the Latin word vacca meaning "cow."

Key Term: Vaccination --- the deliberate introduction of a mild form of a disease (or a related disease) to stimulate immunity. Jenner's method used cowpox to create immunity to smallpox.

---

Opposition to Vaccination

Jenner's discovery faced significant opposition.

Source of Opposition	Reason
Inoculators	Stood to lose money if vaccination replaced inoculation
The Royal Society	Initially refused to publish Jenner's findings (1797)
Religious groups	Objected to putting animal material into humans; some saw it as interfering with God's will
The public	Feared side effects; James Gillray's famous 1802 cartoon showed people growing cow parts after vaccination
Doctors	Some questioned Jenner's evidence, as he had only tested it on one child

Exam Tip: Opposition to vaccination is a recurring theme throughout the Health and the People course. Be ready to draw parallels between opposition to Jenner and later resistance to public health measures.

---

The Spread of Vaccination

Despite opposition, vaccination gradually gained acceptance.

Date	Development
1798	Jenner publishes his findings in An Inquiry into the Causes and Effects of the Variolae Vaccinae
1802	Parliament grants Jenner £10,000 for his work
1806	Parliament grants a further £20,000
1840	Vaccination Act makes inoculation (variolation) illegal and provides free vaccination
1853	Vaccination Act makes vaccination compulsory for all infants
1867	Penalties introduced for parents who refused to vaccinate their children
1871	Vaccination boards set up to enforce the law

---

The Significance of Jenner

Significance	Detail
Saved millions of lives	Vaccination drastically reduced smallpox deaths
Proof of concept	Showed that scientific observation and experiment could prevent disease
Government involvement	Led to the first government intervention in public health through compulsory vaccination
Limitations	Jenner did not understand why vaccination worked --- he could not explain the science behind immunity
No immediate wider impact	Vaccination only worked for smallpox; it did not lead to vaccines for other diseases until Pasteur's work in the 1870s--1880s

Exam Tip: A common exam question is "How significant was Jenner's discovery?" A strong answer acknowledges both its enormous long-term impact and its limitations at the time. Jenner could not explain why his method worked, and it only applied to one disease.

---

Key Dates

Date	Event
1721	Lady Mary Wortley Montagu introduces inoculation to Britain
1796	Jenner vaccinates James Phipps with cowpox
1798	Jenner publishes his findings
1853	Vaccination made compulsory in Britain
1980	WHO declares smallpox eradicated worldwide

---

---

Extended Worked Paragraph: Level 5 Model on a Q4 "Main Factor" Question

Question: "Has the individual been the main factor in the prevention of disease?" (16 marks + 4 SPaG)

The individual --- epitomised by Edward Jenner (1749--1823) --- occupies a central position in the history of disease prevention, but the significance of the individual is always mediated by the factors that enable, constrain, and disseminate their work. Jenner's 1796 vaccination of James Phipps with cowpox lymph obtained from Sarah Nelmes, followed by his 1798 publication of An Inquiry into the Causes and Effects of the Variolae Vaccinae, is rightly canonical: it proved that a mild animal pathogen could confer immunity against a lethal human one, establishing a principle that Pasteur would generalise in the 1880s. Yet Jenner was not working in isolation. He stood on a century of inoculation practice introduced by Lady Mary Wortley Montagu from Istanbul in 1721, popularised by the royal inoculations of Princess Caroline's daughters, and refined by the Suttonian method from the 1760s. Equally, Jenner's research depended on communication infrastructure: the Royal Society's journals, though they rejected his initial paper, ultimately carried his findings across Europe, and Parliament's grants of £10,000 (1802) and £20,000 (1806) show how government could amplify individual achievement. The Vaccination Acts of 1840, 1853, and 1867 --- which made vaccination first free, then compulsory, then punitively enforced --- demonstrate that Jenner's discovery only became a public health intervention when the state acted. Conversely, the eventual eradication of smallpox, declared by the WHO in 1980, required a global coordinated campaign orchestrated by D.A. Henderson from 1967 --- individual genius recapitulated on institutional scale. The sustained judgement must therefore recognise that the individual is the pioneer but never the implementer: Jenner opened the door, but government, communication, and international cooperation walked through it.

---

Grade 4 vs Grade 6 vs Grade 9: AQA Level Language in Action

Question stem: "How significant was Jenner's discovery of vaccination?" (8 marks)