Table 5. Preventive potential of herpes zoster vaccine in preventing herpes zoster in persons aged ≥ 50 y according to the vaccination coverage reached.

Age group (in years)	Estimated number of cases of HZ	Protective efficacy of the vaccine%	Cases prevented according to the vaccination coverage reached
20%	40%	60%	80%	100%
50–59	5984	70%*	838	1676	2513	3351	4189
60–69	6739	64%**	863	1725	2588	3450	4313
≥70	8809	38%**	669	1339	2008	2678	3347
≥50	21 532		2370	4740	7109	9479	11 849

Source: *Schmader et al.,²³ **Oxman et al.²⁰