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Table 3 Serum-bactericidal antibody titers four weeks after application of a booster dose with a quadrivalent conjugate vaccine

From: Persistence of antibodies in laboratory staff immunized with quadrivalent meningococcal polysaccharide vaccine

PN Serum bactericidal antibody titers
A C W135 Y
17 4,096 (16) 8,192 (−) 128 (32) 4,096 (1,024)
18 512 (256) 512 (8) 8,192 (4,096) 8,192 (1,024)
19 8,192 (128) 2,048 (128) 2,048 (1,024) 16,384 (64)
  1. Titers are from three laboratory workers with low antibody titers. Parentheses contain fold increases compared to pre-boost titers (see Additional file 1: Table S1). PN: participant number, ‘-‘: prevaccination value excluded from the sample.