The table shows the percentage of children vaccinated against measles in four countries and the number of measles cases in each country.
Table: The percentage of children vaccinated against measles and the number of measles cases per 100 000 people in four countries
| Country | Children vaccinated (%) | Measles cases per 100 000 people |
|---|---|---|
| W | 58 | 240 |
| X | 76 | 95 |
| Y | 88 | 31 |
| Z | 96 | 2 |
Which conclusion is supported by the data?
The number of measles cases decreases as the percentage vaccinated increases
Measles cases fall to zero in a country once 90% of children are vaccinated
Vaccinating children has no effect on the number of measles cases in a country
Countries with the most cases of measles vaccinate the most of their children
176 exam-style questions on AQA GCSE Biology 3.1 Communicable diseases, covering 3.1.1 Communicable (infectious) diseases, 3.1.2 Viral diseases, 3.1.3 Bacterial diseases, 3.1.4 Fungal diseases, 3.1.5 Protist diseases, 3.1.6 Human defence systems, 3.1.7 Vaccination, 3.1.8 Antibiotics and painkillers, and 3.1.9 Discovery and development of drugs. Each one has a worked solution and a mark scheme showing where the marks go.