The table shows results from two comparable groups during an outbreak.
Table
| Group | Number of people | Number developing the disease |
|---|---|---|
| Vaccinated | 800 | 40 |
| Unvaccinated | 200 | 40 |
Which conclusion is supported by these results?
The disease rate was four times higher in the vaccinated group.
The disease rate was equal in the vaccinated and unvaccinated groups.
The disease rate was four times higher in the unvaccinated group.
The disease rate was two times higher in the unvaccinated group.
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.