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Fig. 2 | Pneumonia

Fig. 2

From: A longitudinal study of natural antibody development to pneumococcal surface protein A families 1 and 2 in Papua New Guinean Highland children: a cohort study

Fig. 2

Geometric mean concentrations (GMC) of IgG responses to PspA1 (a) and PspA2 (b) in non-carrier (grey bars) and Streptococcus pneumoniae carrier (black bars) infants at 3, 9, and 18 months of age. Error bars indicate 95 % confidence intervals of the GMC. ✩ p ≤ 0.05 is considered a statistically significant difference. PspA, pneumococcal surface protein A; AU/ml, arbitrary ELISA units/ml

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