Fig. 1From: The impact of childhood varicella vaccination on the incidence of herpes zoster in the general population: modelling the effect of exogenous and endogenous varicella-zoster virus immunity boostingModel Structure [3, 4, 6]. Adapted from Ouwens et al. [43]. Addition of e(a) parameter to the model structure. Under public license CC BY-NC-ND 4.0.http://creativecommons.org/licenses/by-nc-nd/4.0/Back to article page