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Table 1 Fraction of unvaccinated individuals with S B A ≥1:8 as a function of age group [13]

From: Optimizing strategies for meningococcal C disease vaccination in Valencia (Spain)

Age-group % Seroprotection CI 95%
3-4 years 2.0% [ 0.1%,5.8%]
5-6 years 4.0% [ 0.7%,8.2%]
7-8 years 5.6% [ 2.1%,9.8%]
9-11 years 6.6% [ 2.9%,11.0%]
12-13 years 8.2% [ 4.0%,12.6%]
14-16 years 9.6% [ 5.2%,14.3%]
17-19 years 11.0% [ 6.4%,15.6%]
20-21 years 12.3% [ 7.8%,16.8%]
22-29 years 13.7% [ 9.4%,18.0%]
30-39 years 15.2% [ 11.4%,19.2%]
40-49 years 16.2% [ 12.3%,20.5%]
50-59 years 18.1% [ 13.5%,23.3%]
≥ 60 years 26.6% [ 20.2%,34.1%]