3.7- Immunisation
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| How can immunity be developed by vaccinations? | show 🗑
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| What kind of antigens are used in vaccinations? | show 🗑
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| show | an adjuvant
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| show | An adjuvant is a substance which makes the vaccine more effective, so enhancing the immune response.
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| When does herd immunity occur? | show 🗑
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| Why is establishing herd immunity important? | show 🗑
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| How does herd immunity effect non-immune individuals? | show 🗑
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| show | the percentage of the population that has to be immune for her immunity to be established.
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| show | The herd immunity threshold depends on the type of disease, the effectiveness of the vaccine and the density of the population.
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| What is used to establish herd immunity? | show 🗑
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| show | Difficulties can arise when widespread vaccination is not possible due to poverty in the developing world, or when vaccines are rejected by a percentage of the population in the developed world
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| show | Antigenic variation
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| show | This means that memory cells are not effective against them.
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| What is an example of a pathogen that regularly undergoes antigenic variation and how is this overcome? | show 🗑
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