Two Strains of Polio Are Gone, but the End of the Disease Is Still Far Off

Two Strains of Polio Are Gone, but the End of the Disease Is Still Far Off
In this file photo from April 9, 2018, a boy receives polio vaccine drops during an anti-polio campaign in a low-income neighborhood in Karachi. (Reuters)
Updated 24 October 2019
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Two Strains of Polio Are Gone, but the End of the Disease Is Still Far Off

Two Strains of Polio Are Gone, but the End of the Disease Is Still Far Off

October 23: Only poliovirus Type 1 persists, and only in Pakistan and Afghanistan. But now mutant vaccine viruses are paralyzing some unvaccinated children.

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