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Moffett DB, Llewellyn A, Singh H, Saxentoff E, Partridge J, Boualam L, et al. Progress Toward Poliovirus Containment Implementation — Worldwide, 2019–2020MMWR. 2020;69(37);1330-3.
Just as with type 2 monovalent Sabin oral poliovirus vaccine (OPV), countries using novel type 2 OPV or trivalent Sabin OPV for outbreak response should track and report related materials according to poliovirus containment requirements…