Figure 2.

Antibody titre and positive rates of EV71 neutralizing antibodies in different age groups of children. Negative results were determined by titres of antibodies (≤1:4), and positive results were determined by titres of antibodies (1:8, 1:16, and ≥1:32). All neutralizing antibody titre values that exceed 1:32 were recorded as ≥1:32. Positive rates were generated from all positive results.