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In assessing the effectiveness of the global polio vaccination program started in 1988, a student collected Graphs A and B from two reputable sources - HSC - SSCE Biology - Question 26 - 2011 - Paper 1
Question 26
In assessing the effectiveness of the global polio vaccination program started in 1988, a student collected Graphs A and B from two reputable sources. **Graph A:** ... show full transcript
Worked Solution & Example Answer:In assessing the effectiveness of the global polio vaccination program started in 1988, a student collected Graphs A and B from two reputable sources - HSC - SSCE Biology - Question 26 - 2011 - Paper 1
Step 1
Identify TWO differences and TWO similarities in the data
Answer
Differences:
- Reported vs Estimated Cases: Graph A shows the reported annual global polio cases ranging from 35,613 in 1988 to 395 in 1996, while Graph B provides estimated cases that are significantly higher in 1988, recording 944,900.
- Trends: In Graph A, there is a clear downward trend in reported cases over the years, whereas Graph B depicts fluctuating estimates in certain years before decreasing, indicating differences in reporting reliability.
Similarities:
- Overall Decrease in Cases: Both graphs reflect a downward trend in polio cases from 1988 to 1996, suggesting that the global vaccination program has been effective in reducing the number of cases.
- Highest Reporting Year: Both graphs indicate that the peak for cases occurred in 1988, aligning with the introduction of the vaccination program.
Step 2
Provide reasons in favour of TWO additional types of data required
Answer
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Geographic Distribution Data: Knowing how polio cases are distributed across different regions would help identify areas where the vaccination program needs to be prioritized for better effectiveness.
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Vaccination Coverage Rates: Information on vaccination coverage would provide insights into how many people are being vaccinated, indicating potential gaps in the program.