Fig. 3.
Levels of anti-S1 IgG (panel A) and neutralizing antibodies (panel B) as a function of recipients' age at t2 (14 days after the first dose of vaccine); panels C and D show the same analysis for t3 (14 days after the second dose of the vaccine). Each box-plot represents 1 year, each (jittered) point one individual measurement. The blue line indicates the smoothed means with a 95% confidence band. The dashed lines indicate the respective cut-offs for positivity. In the upper left-hand corner is Spearman's ρ for the correlation between recipients' ages and levels of the different markers.