Table 1. Parameters employed.

Parameter	Interpretation	Value
	Average duration of the maternal antibodies protection	6 months [23]
	Average duration of the latency period	14 days [27]
	Average duration of the varicella infectivity period	7 days [27]
	Average duration of the HZ infectivity period	7 days [27]
	Age specific contact matrices (different for each countries)	based on census data [31]
	Relative VZV infectiousness of breakthrough varicella cases	0.5 [43]
	Relative VZV infectiousness of HZ cases	0.05 [23]
	Adjusting factor for contacts relevant for VZV transmission	fitted against the VZV seroprevalence
	Adjusting factor for contacts relevant for the boosting of CMI (boosting component) accounting for the uncertainty of FOI in adults and the elderly	fitted against HZ incidence
	Average duration of the CMI	fitted against HZ incidence
	Age dependent VZV reactivation rate	fitted against HZ incidence
T	Vaccine take (probability)	unif. sampled from (0.8,1) [15], [17], [37], [39], [42]
	Average duration of vaccine waning immunity	unif. sampled from (1,200) years [52]
	Reduction factor of the risk of developing HZ for vaccinees	unif. sampled from (1/12,1/4) [44]

Model parameters, description and values considered for simulations.