Neco Model Questions Vol1 2022 Biology Question 47
Practice objective / multiple choice question 47 from the 2022 Neco Model Questions Vol1 Biology examination.
In a closed community of 10 000 people, a contagious disease spreads with the following parameters: each infected individual makes contact with an average of 12 persons per day, the probability of transmission per contact is 0.02, and the average infectious period is 5 days. (a) Calculate the basic reproduction number \(R_{0}\). (b) If a vaccine that is 85 % effective is introduced, what minimum proportion of the total population must be vaccinated to achieve herd immunity? Express your answer as a percentage rounded to one decimal place.
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This is Neco Model Questions Vol1 2022 Biology Question 47. It is one of the objective questions from the 2022 Neco Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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