chey7819 chey7819 20-03-2024 Medicine contestada Consider an SIR-type disease where vaccination can provide permanent immunity. If a proportion p of the susceptible population is vaccinated, then the SIR model becomes a) dS/dt = -βSI - pμS b) dS/dt = -βSI - μS c) dS/dt = -βSI d) dS/dt = -βSI + pμS