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Amounts of IgG antibody binding to 6B-coated ELISA plates in various serum samples following preabsorption with various materials. The serum samples (P23B, P4B, and P3B) are identified on the left. The preabsorbents, identified to the left of each bar, are none, C-PS (10 mg/liter), capsular PS of serotype 14 (10 mg/liter), and capsular PS of serotype 9V (10 mg/liter).
