The list contains statements about factors considered during the vaccination of a population - Scottish Highers Human Biology - Question 25 - 2023
Question 25
The list contains statements about factors considered during the vaccination of a population.
1. The type of disease
2. The population density
3. The effectiven... show full transcript
Worked Solution & Example Answer:The list contains statements about factors considered during the vaccination of a population - Scottish Highers Human Biology - Question 25 - 2023
Step 1
1. The type of disease
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Answer
The type of disease is crucial in determining herd immunity. Different diseases vary in how contagious they are and how effective vaccination is against them. Therefore, this factor does affect the herd immunity threshold.
Step 2
2. The population density
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Answer
Population density influences the transmission dynamics of diseases. In densely populated areas, the likelihood of disease spread increases, which in turn may require a higher threshold for herd immunity. Thus, this factor is relevant.
Step 3
3. The effectiveness of the vaccine
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Answer
The effectiveness of the vaccine directly impacts herd immunity. A more effective vaccine can lower the required vaccination coverage to achieve herd immunity. Therefore, this factor significantly affects the herd immunity threshold.
Step 4
4. The percentage of non-immune individuals
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Answer
The percentage of non-immune individuals plays a critical role in this context. A high percentage of non-immune individuals within a population may hinder the achievement of herd immunity. Consequently, this factor also affects the herd immunity threshold.
Step 5
Final Conclusion
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Answer
Based on the analysis, factors 1, 3 (the type of disease and effectiveness of the vaccine) and 4 (the percentage of non-immune individuals) all directly influence the herd immunity threshold. Hence, the correct answer is option C: 1, 2, and 3 only.
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