A new vaccine against an infectious disease was developed - HSC - SSCE Biology - Question 9 - 2022 - Paper 1
Question 9
A new vaccine against an infectious disease was developed. The effectiveness of the vaccine in preventing infection in humans was plotted over time in three differen... show full transcript
Worked Solution & Example Answer:A new vaccine against an infectious disease was developed - HSC - SSCE Biology - Question 9 - 2022 - Paper 1
Step 1
A. The vaccine is ineffective after six months.
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Answer
This statement is incorrect as the graph shows varying effectiveness over time, but does not definitively indicate that the vaccine becomes completely ineffective after six months.
Step 2
B. The younger the person the more effective the vaccine.
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Answer
This conclusion cannot be directly drawn from the graph as it does not provide a clear comparison of effectiveness between different age groups.
Step 3
C. The younger the person, the faster the immunity to infection declines.
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The data does not support this statement because it does not provide evidence regarding the rate of decline in immunity specifically based on age.
Step 4
D. The vaccine offers more protection to younger people than those over 65.
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Answer
This statement is supported by the graph, which indicates that the effectiveness of the vaccine is higher in the younger age groups compared to those aged over 65.
