Detection of vaccine-derived poliovirus circulation by environmental surveillance in the absence of clinical cases by John Kofi Odoom, Evangeline Obodai, Gifty Boateng, Stanley Diamenu, Keren Attiku, Patrick Avevor, Ewurabena Duker, Bismarck Boahene, Miriam Eshun, Emmanuel Gberbie, Joseph Kwadwo Larbi Opare

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