WHO Regions during the SEP. WHO Regional Offices were responsible for conducting the SEP.

Notes on Regions: 1) Africa is a single region within WHO. African divisions represent the CDC program in Western and Central Africa and the administrative divisions used by the SEP. 2) The newly independent state of Bangladesh joined WHO in the South-East Asia Region in 1972. Formerly East Pakistan, it had been included with West Pakistan in the Eastern Mediterranean Region. 3) Ethiopia was part of the Eastern Mediterranean Region until 1977, when it joined the African Region.

Notes on countries: 1) Several countries changed names during or after the SEP. We have included both names and have tried to list the current name first. 2) Map boundaries are approximate, and do not not necessarily represent WHO membership or political status during the entire period of the SEP.