Answer:
Definition of regional groupings
WHO regions: WHO Member States are grouped into 6 WHO regions: African Region, Region of the Americas, South-East Asia Region, European Region, Eastern Mediterranean Region, and Western Pacific Region. See map and the Notes sheet in each spreadsheet for more information.
World Bank income groups: WHO Member States are grouped into 4 income groups (low, lower-middle, upper-middle, and high) based on the World Bank list of analytical income classification of economies for the fiscal year, which is based on the Atlas gross national income per capita estimates (released July annually). See the Notes sheet in each spreadsheet for more information.
World Bank regions: countries are separated into 6 World Bank regions, separating out high-income countries as a 7th group: High Income, East Asia and Pacific, Europe and Central Asia, Latin America and the Caribbean, Middle East and North Africa, South Asia and Sub-Saharan Africa. See the Notes sheet in each spreadsheet for more information.
WHO regions and World Bank income categories: WHO Member States are grouped into low and middle-income countries (LMIC) by WHO region (the 6 WHO regions are used), separating out high-income countries within each of these regions into a 7th group. See the Notes sheet in each spreadsheet for more information.
UN Sustainable Development Goals (SDGs) regions: Countries, areas and territories are classified into groups as defined by the UN for the reporting of SDG indicators in 2017. See also the Notes sheet in each spreadsheet for more information.
UN Millennium Development Goals (MDGs) regions: Regions are classified as "developing" regions and "developed" regions. The developing regions are further broken down into the subregions. See also the Notes sheet in each spreadsheet for more information.
