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biology 0610printed 128 · PDF 128
328 pagesrevision 46933
printed 128 · PDF 128
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o The memory cells produced will thus give long term immunity to
the person against the particular disease
o Vaccinations can also play a great part in the prevention of
spread of diseases
o Vaccination can be used to control the spread of disease by
providing herd immunity. This is where a large amount of the
population is vaccinated and are thus immune to the pathogen, so
the disease cannot spread as there are only a few people left who
can still become infected. The few that cannot be vaccinated, for
example due to medical reasons, are therefore protected against
the disease.