FIG. 2.

Pneumococcal serotype-specific serum IgG concentrations before and after immunization with a 7-valent pneumococcal conjugate vaccine. The clear boxes represent the middle 50% spread before the vaccine, and the shaded boxes represents the middle 50% spread 9 to 11 days after the vaccine. The bars represent 95% spread. The lines in the boxes represent the median values. IgG concentration is measured in micrograms per milliliter. Serotypes are shown with a capital T (for type). (Stata and Microsoft Power Point were used to prepare this figure.)