Waec Model Questions Vol1 2022 Agricultural Science Question 23
Practice objective / multiple choice question 23 from the 2022 Waec Model Questions Vol1 Agricultural Science examination.
In a cattle herd a contagious disease has a transmission coefficient β = 0.3 per contact per day, each animal makes on average 4 contacts per day, and the average infectious period is 10 days. (a) Calculate the basic reproduction number R₀. (b) What minimum proportion of the herd must be immunised with a perfectly effective vaccine to reduce the effective reproduction number below 1? Express your answer as a percentage.
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About This Question
This is Waec Model Questions Vol1 2022 Agricultural Science Question 23. It is one of the objective questions from the 2022 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Medium .
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