A-LevelBiologyInfectious diseases9700/12 · Oct/Nov 2016 · Q381 Mark
Why is it difficult to control the spread of measles? 1 Global air travel for commerce and tourism has increased. 2 The virus that causes measles rapidly evolves resistance to antibiotics. 3 The virus that causes measles shows great antigenic variability. 4 Civil unrest and poverty result in overcrowded living conditions.
A1, 2 and 4
B1, 2 and 3
C1 and 4 only
D4 only
✓ Correct answer
C: 1 and 4 only
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