Figure 2

Neutralizing antibodies against different strains of poliomyelitis virus type 1 in children. The boxplots show the 10th, 25th, 50th (median), 75th and 90th percentiles. The circles indicate outlier observations.
Neutralizing antibodies against different strains of poliomyelitis virus type 1 in children. The boxplots show the 10th, 25th, 50th (median), 75th and 90th percentiles. The circles indicate outlier observations.