Calculate h1 in RCD model for back-calculation when

calculate_h1_rcd(h, alpha, rho, iota, nu, tau, eta, r, rho2)

Arguments

h

daily incidence

alpha

effective treatment probability

rho

observation rate

iota

RCD parameter: maximum number of index cases investigated per population per unit of time

nu

RCD parameter: number of secondary cases investigated per index case

tau

RCD parameter: targeting ratio of the RCD

eta

RCD parameter: probability that an investigated cases is detected (symptoms, test sensitivity, etc.)

r

blood clearance rate

rho2

RCD parameter: observation rate for reactively-detected cases

Value

A scalar equal to the equilibrium value for h1