Topic Summaries

Vaccination

GCSE > Biology > WJEC > GCSE Biology Topic Summaries > The immune system and drugs > Vaccination
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Plant disease and monoclonal antibodies

The brain and the eye

Reproductive hormones and plant hormones

Genetic engineering and modification

Resource cycles and environmental change

Science skills: Measuring results

  • Vaccination introduces a small amount of dead or inactive forms of a pathogen into the body:
    • This stimulates the production of antibodies.
    • If the pathogen enters the body again, memory lymphocytes will recognise the antigens of the pathogen and produce a larger number of specific antibodies faster.
    • The pathogen is destroyed before the person becomes ill.
  • Herd immunity is where the spread of pathogens can be reduced by immunising a large proportion of the population, meaning the disease is unlikely to spread.

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