Negative Binomial Attack Rates

Usage

# S3 method for class 'nb'
F_ar(eir, b, pars)

Arguments

eir

the daily eir for each stratum

b

the probability of infection, per bite

pars

an xds object

Value

a numeric vector of length nStrata

Details

This function computes the daily AR, $\alpha$, as a function of the daily EIR, $E$ or eir, under a negative binomial model for the distribution of bites per person, and $b$, the probability of infection per infective bite: $$\alpha =1-(1+bE/\varphi {)}^{-\varphi }$$ This negative binomial model uses the mu $=bE$ and size $=\varphi$ parameterization (see pnbinom). The formula is equivalent to:

pnbinom(0, mu=b*eir, size=phi, lower.tail=FALSE)

See also