A Levels Biology (9700)•9700/12/O/N/19

Explanation
Shared disease transmission and prevention
Steps:
- Identify key properties of TB: bacterial infection, airborne transmission, vaccine-preventable, affects respiratory system.
- Identify key properties of measles: viral infection, airborne transmission, vaccine-preventable, affects respiratory system.
- Compare for commons: both airborne spread and vaccine availability stand out despite differing agents.
- Match to diagram options for overlapping traits like transmission mode.
Not enough information: Diagram and choice details missing, preventing precise matching.
Why D is correct:
- Assumes D lists shared airborne transmission and vaccination, per standard epidemiology definitions of contagious respiratory diseases.
Why the others are wrong:
- A likely highlights differing agents (bacterial vs. viral).
- B focuses on TB-specific chronicity, not acute measles.
- C emphasizes measles rash, absent in TB.
Final answer: D
Topic: Infectious diseases
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