CAIE A Level Biology 9700 · Immunity
The table below shows data from two regions for a particular infectious disease over one year.
| Region | Percentage of population vaccinated | Number of reported cases per 100,000 people |
|---|---|---|
| Region X | 92% | 12 |
| Region Y | 58% | 450 |
Compare the type of immunity provided by vaccination with the type of immunity that would result from a natural infection. Using the data in the table, explain how vaccination programmes can help control the spread of infectious diseases.
7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.
Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.
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