Regional office for Africa (AFRO) | Algeria, Burkina Faso, Burundi, Chad, Congo/Brazzaville, Democratic Republic of the Congo (DRC), Equatorial Guinea, Eritrea, Ethiopia, Gabon, Ghana, Guinea, Madagascar, Malawi, Niger, Nigeria, Senegal, South Africa, South Sudan, Tanzania, The Islamic Republic of Gambia, Togo |
Regional office for the Eastern Mediterranean (EMRO) | Bahrain, Djibouti, Egypt, Iran, Iraq, Lebanon, Morocco, Oman, Pakistan, Palestine, Sudan, Syria, United Arab Emirates (UAE), Yemen |
Regional office for the Americas (PAHO) | Barbados, Belize, Bolivia, Brazil, Chile, Colombia, Costa Rica, Cuba, Dominican Republic, El Salvador, Guatemala, Nicaragua, Paraguay, Peru, St. Lucia, St. Vincent and the Grenadines, Suriname, Uruguay |
Regional office for South-East Asia (SEARO) | Bangladesh, Bhutan, India, Indonesia, Sri Lanka, Timor-Leste |
Regional office for the Western Pacific (WPRO) | Brunei, Cambodia, China, Kiribati, Lao PDR, Mongolia, Papua New Guinea, Philippines, Vietnam |