Fig 4
Impact of vaccination history on Ab concentrations in young persons. Tetanus- a and diphtheria- b specific Ab concentrations are shown in correlation to the time since the last vaccination before recruitment for this study. Correlations were calculated using Ab concentrations assessed in young adults (n = 46) before (day 0_2010) and 4 weeks after (day 28_2010) the tetanus/diphtheria vaccination in 2010. Spearman rank correlation coefficients (rs) and p-values are indicated