Fig. 4

Distribution of values of anti-PRP IgG among children under the age of 5 years. The data are shown as median values per age group and per vaccination schemes (2 + 1 or 3 + 1) as indicated. The number of children in each group is given in the table beneath the Fig. P value was calculated using Mann-Whitney test. Only P value of < 0.05 is shown for the group of 2 year of age