AQA · Biology · 8461
GCSE Biology: Vaccination
Infection and response · AQA GCSE Biology (8461), specification point 4.3.1.7. Cards are generated from the exam board's own specification for "Vaccination", and every card links back to the page it came from. Specification © AQA — used with attribution.
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What is introduced into the body during vaccination?
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Small quantities of dead or inactive forms of a pathogen.
Which cells does a vaccine stimulate to produce antibodies?
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White blood cells.
Vaccination stimulates white blood cells to produce ?.
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antibodies
Why does a vaccinated person not become ill if the same pathogen re-enters the body?
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Their white blood cells respond quickly, producing the correct antibodies fast enough to prevent infection.
Why is the pathogen in a vaccine dead or inactive?
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So it can stimulate an immune response (antibody production) without causing the disease.
How does immunising a large proportion of a population reduce the spread of a pathogen?
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Fewer people can catch and pass on the pathogen, so it is less likely to reach unvaccinated individuals (herd immunity).
The spread of pathogens can be reduced by immunising a ? of the population.
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large proportion
Explain how vaccination prevents illness in an individual.
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A dead or inactive pathogen makes white blood cells produce antibodies; on later exposure to the live pathogen, antibodies are produced quickly enough to prevent infection.
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