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Predicted impact of demographic changes on the future epidemiology of varicella (2010–2050). (a) Predicted mean age (and 95% CI, shaded areas) at varicella over time. Different colours correspond to different projection scenarios. (b–d) Predicted age-specific VZV seroprevalence at different years for (b) the baseline scenario, (c) the ‘lowest birth rate’ scenario L and (d) the ‘highest birth rate’ scenario H.
