It will be six to eight weeks before data is analyzed and it is conclusively established that there have been no new cases in Africa since 11 August 2014.

It will be six to eight weeks before data is analyzed and it is conclusively established that there have been no new cases in Africa since 11 August 2014.
Africa has never before accomplished this, but for a region to be declared polio-free, three years must lapse without a new infection.
Source-ANI
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