Infection & ResponseKey Facts

Key Facts: Vaccination and Herd Immunity

Part of Vaccination and Herd Immunity · GCSE GCSE Biology revision

This key facts covers Key Facts: Vaccination and Herd Immunity within Vaccination and Herd Immunity for GCSE Biology. How vaccines work, types of vaccines, population immunity, vaccination programs It is section 2 of 15 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 2 of 15

Practice

21 questions

Recall

12 flashcards

Key Facts: Vaccination and Herd Immunity

Vaccination: The process of introducing antigens to stimulate adaptive immunity without causing disease
Vaccine: A preparation containing antigens that triggers immune memory formation
Herd immunity: When enough people in a population are immune to prevent disease spread
Live attenuated: Vaccines containing weakened but living pathogens
Inactivated: Vaccines containing killed pathogens or pathogen components
Booster shots: Additional vaccine doses to maintain immunity levels
Vaccination schedule: Planned timeline for administering different vaccines

Keep building this topic

Read this section alongside the surrounding pages in Vaccination and Herd Immunity. That gives you the full topic sequence instead of a single isolated revision point.

Edward Jenner and the Birth of Vaccination How Vaccines Work Types of Vaccines — Extension Content Vaccination & Herd Immunity

Practice Questions for Vaccination and Herd Immunity

What do vaccines contain?

A. Live, active pathogens that cause disease
B. Dead or inactive pathogens or their antigens
C. Antibiotics to kill bacteria
D. White blood cells from another person

1 markfoundation

Explain how vaccination protects a person from getting a disease. [3 marks]

3 marksstandard

Quick Recall Flashcards

Why don't vaccines cause the disease they protect against?

Vaccines use dead or inactive pathogens, or just antigens from the pathogen's surface. The pathogen cannot multiply or cause infection. The immune system still recognises the antigens and builds immunity.

What is a vaccine and how does it work?

A vaccine contains a dead or weakened form of a pathogen (or its antigens). It triggers the immune system to produce antibodies and memory cells without causing disease. If the real pathogen enters later, memory cells respond rapidly.

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Edward Jenner and the Birth of Vaccination

How Vaccines Work