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01 Oct 2008 description

Note: The map included a table showing the number of primary-aged children out of school. Map production date estimated.

28 Jan 2008 description

Excludes viruses detected from environmental surveillance and vaccine derived polio viruses.

08 Jan 2008 description

Note: Excludes viruses detected from environmental surveillance and vaccine derived polio viruses.

01 Jan 2008 description

Note: Excludes viruses detected from environmental surveillance and vaccine derived polio viruses.

11 Dec 2007 description

Excludes viruses detected from environmental surveillance and vaccine derived polio viruses.

04 Dec 2007 description

Excludes viruses detected from environmental surveillance and vaccine derived polio viruses.

27 Nov 2007 description

Excludes viruses detected from environmental surveillance and vaccine derived polio viruses.