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5.3 Immune system and medicines

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Question 20

A hospital employs 4500 people. A vaccination programme reaches 64% of the employees. Of the employees vaccinated, 75% develop immunity.

None of the employees is immune before the programme and none is exposed to the pathogen while immune responses are developing.

How many of the vaccinated employees are expected not to develop immunity?

[1]
A

162016201620

B

234023402340

C

720720720

D

112511251125

Markscheme

5.3 Immune system and medicines Questions

  1. GCSE
  2. /Biology
  3. /5.3 Immune system and medicines

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.

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