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In the SIR model, we assume that everyone in the population is susceptible at time t= 0 except the very small fraction that is already infected. Suppose that some fraction of the population has received a vaccine, so they cannot catch the disease. The vaccine makes the fraction of the population that is susceptible at time t = 0 smaller.
(a) Using HPGSystemSoIver applied to the SIR model with
(b) If
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Differential Equations
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