Figure 4From: An approximation of herd effect due to vaccinating children against seasonal influenza – a potential solution to the incorporation of indirect effects into static models Linear relationships between effective vaccine coverage and herd effect. Point estimates identified from the literature review and linear relationships (derived from Equation 3 in Bauch et al. (2009) [12] or from fitting to general linear equation) between relative risk of infection in the unvaccinated population as a function of (A) effective coverage in children, and (B) change in effective vaccine coverage in entire population induced by varying levels of effective coverage in children.Back to article page