This map tells us the percentage of 1-year olds that have received three doses of a vaccine with combined protection against diphtheria, tetanus, and pertussis.
Data source: 2010 World Health Statistics Report from the World Health Organization. Data from 2008. This data was collected by the World Health Organization. The World Policy Analysis Center is not responsible for any errors or omissions.
- These estimates are based on the United Nations Children’s Fund and World Health Organization databases which combine information from country-specific routine reporting systems, Multiple Indicator Cluster Surveys, and Demographic and Health Surveys, which are all routinely administered.
- DTP3 coverage by 12 months of age is often used as a proxy to evaluate the performance of primary health care and immunization systems.
- The herd immunity level, as established by the US Centers for Disease Control and Prevention, is 85% for diphtheria, and 92%-94% for pertussis. Herd immunity is the state at which a sufficient proportion of the population has been immunized against a disease to provide a level of protection among those who have not been immunized for that disease.