1. World Health Organization Regional Assessments of the Risks of Poliovirus Outbreaks. Issue 4 (23rd March 2013) Authors: Lowther, Sara A.; Roesel, Sigrun; O'Connor, Patrick; Landaverde, Mauricio; Oblapenko, George; Deshevoi, Sergei; Ajay, Goel; Buff, Ann; Safwat, Hala; Salla, Mbaye; Tangermann, Rudi; Khetsuriani, Nino; Martin, Rebecca; Wassilak, Steven Journal: Risk analysis Issue: Volume 33:Issue 4(2013) Page Start: 664 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗