Waec Model Questions Vol1 2024 Biology Question 33
Practice objective / multiple choice question 33 from the 2024 Waec Model Questions Vol1 Biology examination.
In a town of 10,000 inhabitants, disease Y has a basic reproduction number (R₀) of 2.5. A vaccine against Y is 70 % effective in preventing infection, and 20 % of the population is already immune due to previous exposure. What is the minimum number of additional people that must be vaccinated to achieve herd immunity against disease Y?
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About This Question
This is Waec Model Questions Vol1 2024 Biology Question 33. It is one of the objective questions from the 2024 Waec Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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