Neco 2023 Biology Question 30

Practice objective / multiple choice question 30 from the 2023 Neco Biology examination.

Neco 2023 Biology Objective / Multiple Choice Hard Difficulty

Question 30 NECO • 2023 • BIOLOGY • objective

In a community of 10\,000 people, an outbreak of disease X occurs. A total of 800 individuals become infected, of whom 60 die. Prior to the outbreak, a vaccine was administered to 4\,000 people. Among the vaccinated, 50 become infected and 2 die. (a) Calculate the overall case‑fatality rate (CFR) for the outbreak. (b) Determine the vaccine efficacy against infection. (c) Determine the vaccine efficacy against death among those infected. Express all percentages to one decimal place.

A. 6.0%; 80.0%; 55.0%

Correct Answer B. 7.5%; 90.0%; 48.3%

C. 8.0%; 90.0%; 50.0%

D. 7.5%; 85.0%; 45.0%

Correct Answer

Correct Option:

7.5%; 90.0%; 48.3%

This is Neco 2023 Biology Question 30. It is one of the objective questions from the 2023 Neco Biology examination.

Difficulty level: Hard .

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