Waec Model Questions Vol1 2023 Biology Question 43
Practice objective / multiple choice question 43 from the 2023 Waec Model Questions Vol1 Biology examination.
In a community of 10 000 people an infectious disease has a basic reproduction number R₀ = 2.5. A vaccine is 80 % effective. (a) What minimum proportion of the total population must be vaccinated to achieve herd immunity? (b) If only 60 % of the population is vaccinated, what is the effective reproduction number Rₑ?
Answer Options
About This Question
This is Waec Model Questions Vol1 2023 Biology Question 43. It is one of the objective questions from the 2023 Waec Model Questions Vol1 Biology examination.
Difficulty level: Hard .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.