Make parameters for SIR human model, with defaults
make_Xpar_SIR(nStrata, Xopts = list(), b = 0.55, r = 1/180, c = 0.15)is the number of population strata
a list that could overwrite defaults
the proportion of infective bites that cause an infection
the the duration of an infection
the proportion of bites on infected humans that infect a mosquito
a list