Featured HealthWHO 2020 Certification: Nigeria marks 3 years of free PolioBy Abisola THOMPSONAugust 22, 2019August 22, 2019 by By Abisola THOMPSONAugust 22, 2019August 22, 201901359 Nigeria has achieved three years without a case of Wild Polio Virus (WPV) since the last isolated WPV case in Borno on Aug. 21, 2016.