Compute the daily FoI from the daily EIR under a negative binomial model for exposure
# S3 method for class 'nb'
F_foi(eir, b, pars)a numeric vector of length nStrata
This function computes the local daily FoI, \(h\) as a function of the local daily EIR, \(E\), under a negative binomial model for the distribution of bites per person, and \(b\), the probability of infection per infective bite: $$h = \phi \log{\frac{1 + b E}\phi}$$ The expression is derived by solving the expression in F_ar.nb for \(E\) This negative binomial model uses the mu \(= bE\) and size \(=\phi\) parameterization (see pnbinom).
Related topics: Exposure.xde and F_ar.nb and setup_exposure_nb