FIGURE 1.

Estimated number of children who did not receive the first doses of diphtheria-tetanus-pertussis-containing vaccine and measles-containing vaccine, and dropout from the first to third dose of diphtheria-tetanus-pertussis–containing vaccine and from the first dose of diphtheria-tetanus-pertussis–containing vaccine to the first dose of measles-containing vaccine, by World Bank economic classification* and World Bank-defined fragile, conflict-affected, and vulnerable settings^† — worldwide, 2019–2023

Abbreviations: DTPcv = diphtheria-tetanus-pertussis–containing vaccine; DTPcv1 = first DTPcv dose; DTPcv3 = third DTPcv dose; FCV = fragile, conflict-affected, and vulnerable; GNI = gross national income; MCV1 = first measles-containing vaccine dose.

* Economic classification is based on GNI per capita, calculated in U.S. dollars (https://datahelpdesk.worldbank.org/knowledgebase/articles/906519-world-bank-country-and-lending-groups). For the current 2025 fiscal year, low-income economies are defined as those with a GNI per capita, calculated using the World Bank Atlas method, of ≤$1,145 in 2023; lower-middle–income economies are those with a GNI per capita of $1,146–$4,515; upper-middle–income economies are those with a GNI per capita of $4,516–$14,005; high-income economies are those with a GNI per capita of >$14,005.

^† FCV is a broad term describing a range of situations, including humanitarian crises, protracted emergencies, and armed conflicts. The 31 countries listed as FCV in 2023 included Afghanistan, Bangladesh, Burkina Faso, Burma, Burundi, Cameroon, Central African Republic, Chad, Colombia, Democratic Republic of the Congo, El Salvador, Ethiopia, Guatemala, Haiti, Honduras, Iraq, Lebanon, Libya, Madagascar, Mali, Mozambique, Niger, Nigeria, Somalia, South Sudan, the Palestinian Territories, Sudan, Syria, Ukraine, Venezuela, and Yemen. https://gho.unocha.org/