A university is considering a vaccination programme for 18 000 students. Its numerical benchmark permits no more than one expected serious vaccine reaction for every 100 cases of long-term damage prevented.
Vaccinating all the students is predicted to prevent 360 cases of long-term damage. One serious vaccine reaction is expected among every 4500 vaccinated students.
Which statement correctly compares the predictions with the university's benchmark?
The expected serious-reaction frequency is higher than the benchmark permits.
The expected serious-reaction frequency cannot be calculated from these data.
The expected serious-reaction frequency is lower than the benchmark permits.
The expected serious-reaction frequency is equal to the benchmark.
87 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.