- 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
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 programmes 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.
Practice questions for Vaccination and Herd Immunity
What do vaccines contain?
Explain how vaccination protects a person from getting a disease. [3 marks]
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.