A-LevelBiologyInfectious diseasesOct/Nov 2013Paper 1 Q371 Mark
The World Health Organization (WHO) set a target to eradicate polio, using vaccines, by the year 2000. However, cases are still being reported in some parts of the world after this date. What explains these new cases of polio? 1 Some parts of countries are difficult to reach because of poor transport or wars. 2 There is not enough research to develop more effective vaccines. 3 Records of vaccinated and unvaccinated people are incomplete.
A1 only
B1 and 2 only
C1 and 3 only
D2 and 3 only
✓ Correct Answer
The correct answer is C: 1 and 3 only
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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