Fig. 1

Estimated total varicella incidence over time, stratified by age groups, as obtained by models TI and PI, under (a) the no vaccination scenario and (b) the combined varicella and HZ routine vaccinations V_RHZ_R. c Estimated total varicella incidence over time, stratified by type of infection (natural vs. breakthrough varicella), as obtained by models TI and PI, under the combined varicella and HZ routine vaccinations V_RHZ_R. Estimated total HZ incidence, stratified by age groups, as obtained by models TI and PI, under the different considered policies at a time horizon of d 25 years, e 50 years, and f 85 years