Waec Model Questions Vol1 2018 Biology Question 32
Practice objective / multiple choice question 32 from the 2018 Waec Model Questions Vol1 Biology examination.
A contagious disease has a basic reproduction number (R₀) of 4. To achieve herd immunity, a proportion of the population must be immune equal to 1 - 1/R₀. In a town of 2,000 inhabitants, 60 % are currently vaccinated. How many additional people must be vaccinated to reach the herd‑immunity threshold?
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About This Question
This is Waec Model Questions Vol1 2018 Biology Question 32. It is one of the objective questions from the 2018 Waec Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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