Explanation Given information: In S − I − R model, variable S represents the number of people susceptible to becoming sick, the variable I represents the number of people currently infected, and R represents the rest of the population. d S d t = − a S I d I d t = a S I − b I Calculation: In S − I − R model, variable S represents the number of people susceptible to becoming sick, the variable I represents the number of people currently infected, and R represents the rest of the population. In this model number of people susceptible to get sick decreases with time as people become infected. The rate at which people get infected is proportional to the number of contact between infected and susceptible people. So, d S d t = − a S I Here, d S d t is negative because the number of people susceptible to get sick is decreasing

6th Edition

ISBN: 9781119399353

Author: DA

Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT

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Chapter 9.7, Problem 3P

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The most of people at the British boarding school eventually got sick.

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The most of people at the British boarding school eventually got sick.

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The most of people at the British boarding school eventually got sick.