Volume 5, Number 5—October 1999
Dispatch
Diphtheria Antitoxin Levels in the Netherlands: a Population-Based Study
Figure 2

Figure 2. Diphtheria antitoxin titer (geometric mean titer ± 2 standard errors) by age group and linear regression of diphtheria antitoxin antibody titer (in 2log) with age (in 2log years) for persons who received the sixth diphtheria vaccination at the age of 8 or 9 years (n = 961) in the nationwide sample, the Netherlands.