Neco Model Questions Vol1 2025 Biology Question 48

Practice objective / multiple choice question 48 from the 2025 Neco Model Questions Vol1 Biology examination.

Neco Model Questions Vol1 2025 Biology Objective / Multiple Choice Hard Difficulty
Question 48 NECO_MODEL_QUESTIONS_VOL1 • 2025 • BIOLOGY • objective

A newly emerging infectious disease has a basic reproduction number \(R_{0}=3.5\). A vaccine available for this disease is 85 % effective. Ten percent of the population is already immune because of prior infection. What minimum proportion of the total population must be vaccinated to achieve herd immunity?

Answer Options

Correct Answer A. Approximately 72 % of the total population needs to be vaccinated.
B. Approximately 80 % of the total population needs to be vaccinated.
C. Approximately 60 % of the total population needs to be vaccinated.
D. Approximately 68 % of the total population needs to be vaccinated.
Correct Answer
A
Correct Option:
Approximately 72 % of the total population needs to be vaccinated.

About This Question

This is Neco Model Questions Vol1 2025 Biology Question 48. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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