Set up a F_infect model with immunity of the form $$b_0 e^{-v_h/N_b}$$

setup_F_infect_im(b0, Nb, nStrata)

Arguments

b0

probability of infection per infectious bite, no immunity

Nb

the number of effective types

nStrata

the number of population strata

Value

an F_infect.b model object