Measles is a disease caused by a virus. Children in one country are offered a vaccine against measles.
The Table shows the percentage of children vaccinated and the number of cases of measles in five years.
Table
| Year | Percentage of children vaccinated | Number of cases of measles |
|---|---|---|
| 2014 | 92 | 120 |
| 2016 | 88 | 410 |
| 2018 | 85 | 980 |
| 2020 | 91 | 300 |
| 2022 | 95 | 40 |
Describe the relationship between the percentage of children vaccinated and the number of cases of measles.
Calculate the percentage increase in the number of cases of measles between 2014 and 2018.
Some babies are too young to be vaccinated against measles.
Explain why the risk of an unvaccinated baby catching measles was higher in 2018 than in 2014.
Give one reason why some parents choose not to have their children vaccinated.
45 exam-style questions on Edexcel GCSE Biology 5.3 Immune system and medicines, covering 5.3.1 The specific immune system, 5.3.2 Response to immunisation, 5.3.3 Advantages and disadvantages of immunisation, 5.3.4 Antibiotics and bacterial infections, 5.3.5 Aseptic techniques in culturing, 5.3.6 Cross-sectional areas of cultures, 5.3.7 Stages of developing new medicines, and 5.3.8 Production of monoclonal antibodies. Each one has a worked solution and a mark scheme showing where the marks go.