Africa now free of wild poliovirus, but polio threat remains
JOHANNESBURG (AP) — Health authorities on Tuesday are expected to declare the African continent free of the wild poliovirus after decades of effort, though cases of vaccine-derived polio are still sparking outbreaks of the paralyzing disease in more than a dozen countries.
The declaration would leave Pakistan and neighboring Afghanistan as the only countries thought to still have the wild poliovirus, with vaccination efforts against the highly infectious, water-borne disease complicated by insecurity and attacks on health workers.
The announcement by the African Regional Certification Commission for Polio Eradication comes after no cases have been reported for four years. Polio once paralyzed some 75,000 children a year across Africa.
Health authorities see the declaration as a rare glint of good news in Africa amid the coronavirus pandemic, an Ebola outbreak in western Congo, the world’s worst measles outbreak in Congo and the persistent deadly challenges of malaria, HIV and tuberculosis.
The World Health Organization says it is just the second time a virus has been eradicated in Africa, after the elimination of smallpox four decades ago.
But sometimes patchy surveillance across the vast continent of 1.3 billion people raises the possibility that scattered cases of the wild poliovirus still remain, undetected.
The final push to combat the wild poliovirus focused largely on northern Nigeria, where the Boko Haram Islamic extremist group has carried out a deadly insurgency for more than a decade. Health workers at times carried out vaccinations on the margins of the insecurity, putting their lives at risk.
Africa's last reported case of the wild poliovirus was in Nigeria in 2016. The country a year earlier had been removed from the global list of polio-endemic...
