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3.1 Communicable diseases

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Question 82
F

A new vaccine is given as two injections, four weeks apart. Why is the second injection given?

[1]
A

It increases the number of memory cells, so immunity is stronger and lasts longer

B

It replaces the antibodies from the first injection, which have been broken down

C

It introduces a live form of the pathogen once the person has become partly immune

D

It allows the body to produce a different antibody against the same antigen

Markscheme

3.1 Communicable diseases Questions

  1. GCSE
  2. /Biology
  3. /3.1 Communicable diseases

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.

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