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Table 1 Weighted VZV seroprevalence data tested by ELISA and stratified by varicella vaccination status in children 1–17 years of age, Germany (sera collected 2003–2006, n = 13,433)

From: Varicella-zoster virus seroprevalence in children and adolescents in the pre-varicella vaccine era, Germany

Anti-VZV IgG antibodies tested by ELISA   Varicella vaccination status Total
No vaccination card available Varicella vaccinated Not varicella vaccinated
Positive number (n) 811 124 10,156 11,091
weighted rate (%) 87.7% 48.9% 80.3% 80.3%
95% CI [%] [84.8–90.1] [40.2–57.8] [79.3–81.3] [79.4–81.2]
Negative number (n) 109 90 2023 2222
weighted rate (%) 12.0% 41.4% 18.9% 18.8%
95% CI [%] [9.7–14.8] [34.4–48.8] [18.0–19.9] [17.9–19.8]
Equivocal result number (n) 4 18 98 120
weighted rate (%) 0.3% 9.6% 0.7% 0.9%
95% CI [%] [0.1–1.0] [5.7–15.9] [0.6–0.9] [0.7–1.1]
Total number (n) 924 232 12,277 13,433
weighted rate (%) 100.0% 100.0% 100.0% 100.0%