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Table 2 The anti-PT IgG titre distribution in different age groups

From: Seroprevalence of Bordetella pertussis specific Immunoglobulin G antibody levels among asymptomatic individuals aged 4 to 24 years: a descriptive cross sectional study from Sri Lanka

Age group (years) <55 IU/mL Number (%) 60–125 IU/mL Number (%) >125 IU/mL Number (%)
4 to 7 (n = 95) 100 0 0
8 to 11 (n = 77) 90.9 9.09 0
12 to 15 (n = 59) 91.52 8.47 0
16 to 19 (n = 68) 75 14.7 10.29
20 to 24 (n = 86) 95.34 2.3 2.3
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