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. 2012 Oct 16;7(10):e46916. doi: 10.1371/journal.pone.0046916

Figure 2. Salivary IgG and IgA levels (GMC; ng/ml) at 12 or 24 months of age in unvaccinated children after previously being colonized with the homologous serotype at 6 weeks, 6, 12, 18 or 24 months of age.

Figure 2

Closed squares: serotype-negative children, open squares: children with serotype-positive swabs. *Significant difference; p<0.05.