Immunity and Vaccinations

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4 Terms

1
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Name the five stages of immunity?

  1. A lymphocyte recognises the antigen of an invading microorganism.

  2. Lymphocyte produces h\e specific antibody to neutralise the microorganism.

  3. The lymphocyte cell divides repeatedly producing many clones of the cell all producing the same specific antibody.

  4. Once the microorganisms have been destroyed all the clone cells die off except a few. These cells are memory cells.

  5. If the same microbe is encountered again the antibodies will be produced faster and in larger numbers, hopefully destroying the microbes before symptoms are felt.

2
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What is a vaccinations?

This is a dead, attenuated or part of the microbe with the antigen on.

3
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What is herd immunity?

If most people in society are immune then this prevents the spread of the disease those who are not yet vaccinated.

4
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If the same microbe is encountered again what happens?

Memory cells recognise them quickly and a large number of antibodies are produced in a short time.