*3.3. Triangulation of Tetanus Seroprotection and Vaccination Coverage*

The proportions of children with minimal tetanus seroprotection (≥0.01 IU/mL) were higher than annual estimates of DTP3 coverage from WHO/UNICEF estimates of national vaccination coverage (WUENIC) and vaccination coverage surveys (DHS/MICS) in all age cohorts but lower than official country-reported DTP3 coverage among children aged 4, 5 and 8 years (Figure 5). When available, estimates of DTP3 coverage from DHS or MICS surveys correlated better with the proportion of children who had full seroprotection against tetanus compared with minimal seroprotection.

**Figure 5.** Triangulation of tetanus seroprotection and DTP3 vaccination coverage among children aged <15 years, Nigeria, 2018. WUENIC: WHO/UNICEF estimates of national immunization coverage; DTP3: 3 doses of diphtheria-tetanus-pertussis vaccine; DHS: Demographic and Health Survey; MICS: Multiple Indicator Cluster Survey.
