The reports about the disease came from the capital Windhoek and the eastern town of Aranos, Shangula. Tests conducted in neighboring South Africa indicated that it was the Wild Virus Type 1 strain of the disease, Bloomberg reports.
Seven people have died and 27 others have been paralysed since mid-May, according to the BBC News.
Investigations into whether the outbreak was due to faeces infested water or foodstuffs, or whether it had been brought in from outside are still not conclusive.
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