Neco Model Questions Vol1 2024 Biology Question 32

Practice objective / multiple choice question 32 from the 2024 Neco Model Questions Vol1 Biology examination.

Neco Model Questions Vol1 2024 Biology Objective / Multiple Choice Hard Difficulty
Question 32 NECO_MODEL_QUESTIONS_VOL1 • 2024 • BIOLOGY • objective

A contagious disease has a basic reproduction number of \(R_0 = 2.5\). A vaccine available for the disease is 80% effective at preventing infection.\n(a) Calculate the minimum proportion of the total population that must be vaccinated to achieve herd immunity.\n(b) If only 60% of the population can be vaccinated because of medical contraindications, determine the effective reproduction number after vaccination and state whether an outbreak can still occur.

Answer Options

Correct Answer A. Minimum vaccination coverage = 75%; effective reproduction number after vaccinating 60% = 1.3 (outbreak can still occur)
B. Minimum vaccination coverage = 80%; effective reproduction number after vaccinating 60% = 0.9 (outbreak prevented)
C. Minimum vaccination coverage = 60%; effective reproduction number after vaccinating 60% = 1.0 (outbreak unlikely)
D. Minimum vaccination coverage = 70%; effective reproduction number after vaccinating 60% = 1.5 (outbreak can still occur)
Correct Answer
A
Correct Option:
Minimum vaccination coverage = 75%; effective reproduction number after vaccinating 60% = 1.3 (outbreak can still occur)

About This Question

This is Neco Model Questions Vol1 2024 Biology Question 32. It is one of the objective questions from the 2024 Neco Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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