Table 2.

Incidence of Herpes Zoster Among Individuals Who Received Recombinant Zoster Vaccine With and Without Concomitant Vaccine

	No. of Individuals	No. of HZa Cases	Total No. of Person-Years	Incidence Rate per 1000 Person-Years (95% CI)
With concomitant vaccine	12 898	41	18 327.7	2.2 (1.6–3.0)
Without concomitant vaccine	28 353	136	40 297.4	3.4 (2.9–4.0)

Abbreviations: CI, confidence interval; HZ, herpes zoster.

HZ was defined as an HZ diagnosis code plus prescription of an antiviral. Individuals were followed from index date until occurrence of HZ, disenrollment from Kaiser Permanente Southern California, death, or end of follow-up (30 September 2020).