A-LevelBiologyInfectious diseases9700/12 · May/June 2013 · Q361 Mark
A country had fewer than 2.5 deaths per 100 000 people from TB in one year and the next year this rose to 25 deaths per 100 000. What may have contributed to this change? 1 decrease in contact tracing 2 increase in refugee camps 3 water supply contaminated by sewage
A1 and 2 only
B1 and 3 only
C2 and 3 only
D1, 2 and 3
✓ Correct answer
A: 1 and 2 only
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