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Africa declared free from wild polio — but vaccine-derived strains remain

No new cases of wild poliovirus have been recorded on the continent since 2016, but other types of the virus persist.
  1. Giorgia Guglielmi
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Africa is free from wild poliovirus, the World Health Organization (WHO) announced on 25 August — leaving just two countries where the virus remains endemic, Afghanistan and Pakistan.

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doi: https://doi.org/10.1038/d41586-020-02501-3

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