Neco Model Questions Vol1 2020 Biology Question 47
Practice objective / multiple choice question 47 from the 2020 Neco Model Questions Vol1 Biology examination.
A contagious disease has a basic reproduction number \(R_0 = 2.5\). A vaccine available for this disease is \(80\%\) effective (i.e., each vaccinated individual acquires immunity with probability 0.80). (a) Calculate the minimum proportion of the total population that must be immunised (through vaccination) to achieve herd immunity. (b) If only \(60\%\) of the population is vaccinated, determine the effective reproduction number \(R_e\) and state whether the infection will increase or decline.
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This is Neco Model Questions Vol1 2020 Biology Question 47. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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