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The following ODEs have been proposed as a model of an epidemic:
where
(a) If a single infectious individual enters the city at
(b) Suppose that after recovery, there is a loss of immunity that causes recovered individuals to become susceptible. This reinfection mechanism can be computed as rR, where r 5 the reinfection rate. Modify the model to include this mechanism and repeat the computations in (a) using
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Chapter 28 Solutions
Numerical Methods for Engineers
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