if $R 0$ for influenza is 12 in a population where half of the population is immune, the effective reproductive number for influenza is 4 . a - True.
b - False.

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Accepted Answer

***B*** ∻Key Concept∻ ⚹Effective Reproductive Number (Re)⚹ ∻Explanation∻ ⚹The effective reproductive number, Re, is the average number of secondary infections produced by a single infected individual in a population where some individuals are immune. If $R_0$ (the basic reproductive number) for influenza is 12 and half of the population is immune, Re would be $R_0 imes (1 - ext{proportion immune})$. Therefore, Re would be $12 imes (1 - 0.5) = 6$, not 4.⚹◊What factors could contribute to a population having a higher percentage of immunity to influenza?⍭ Generate me a similar question◊

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