Life expectancy saw steady improvement after world war 2 in all of the following regions except

Sub-Saharan Africa.

Explanation:

What this map shows is that all regions of the world experienced a steady improvement in life expectancy after World War II, except for Sub-Saharan Africa. We can see that during the 1990s, the life expectancy of the region began to decline, while most of the world thrived. Although there are many economic and political reasons for it, one of the major problems of the region was the AIDS epidemic, which claimed many lives. The region continues to struggle with this problem nowadays.