Gce Model Questions Vol1 2024 Biology Question 39
Practice objective / multiple choice question 39 from the 2024 Gce Model Questions Vol1 Biology examination.
A newly emerging infectious disease has a basic reproduction number \(R_{0}=3\). A vaccine available for this disease has an efficacy of \(80\%\).\n\n(a) What proportion of the population must be vaccinated to achieve herd immunity?\n\n(b) If only \(70\%\) of the population are vaccinated, what is the effective reproduction number \(R_{\text{eff}}\) under these conditions? Give your answers as decimals rounded to two decimal places.
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This is Gce Model Questions Vol1 2024 Biology Question 39. It is one of the objective questions from the 2024 Gce Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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