Ado Ibrahim carries his son Aminu through a village in northern Nigeria. Aminu was paralyzed by polio in 2012. David P. Gilkey/NPR hide caption

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Polio Rears Its Head Again In Africa

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A Pakistani health worker gives a polio vaccine to students in Peshawar, Pakistan, in March. Polio remains endemic in Pakistan after the Taliban banned vaccinations, attacks targeted medical staffers and suspicions lingered about the inoculations. Mohammad Sajjad/AP hide caption

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Measles, the reorganization of the World Health Organization and the Zika virus could all make global health headlines in 2016. Rich Pedroncelli, Raphael Satter, Felipe Dana/AP hide caption

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Ukrainian deputy minister of health Igor Pereginets holds a 2-year-old getting a polio vaccination in Kiev on October 21 — part of a campaign launched after two cases were reported in September. Genya Savilov/AFP/Getty Images hide caption

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April 1959: Bottles containing the polio vaccine. M. McKeown/Getty Images hide caption

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The Oral Polio Vaccine Can Go 'Feral,' But WHO Vows to Tame It

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Next Year Could Mark The End Of Polio

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Two polio cases have been reported in Ukraine, where some parents are fearful of vaccinations. Above: A child receives the diphtheria, whooping cough and tetanus vaccine in a children's hospital in Kiev. Sergei Chuzavkov/AP hide caption

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These two Portuguese language posters are pro-inoculation. The one at left, produced in 1977, says, "Vaccinate and protect the children." The one at right, from '87, sends a similar message, noting that vaccination offers an opportunity for every youngster. National Library of Medicine hide caption

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A child is vaccinated in Makadara Health Clinic, Nairobi, Kenya. Greg Warner/NPR hide caption

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Catholic Bishops In Kenya Call For A Boycott Of Polio Vaccines

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At the health clinic in Minjibir, Nigeria, a child is immunized for polio. David Gilkey/NPR hide caption

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Polio Is Active In Only 3 Countries. Soon It Could Be Down To 2

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