Research article Risk assessment, risk management and risk-based monitoring following a reported accidental release of poliovirus in Belgium, September to November 2014 E Duizer 1 , S Rutjes 1 , AMdR Husman 1 2 , J Schijven 3 4 1. National Institute for Public Health and the Environment (RIVM), Center for Infectious Diseases Control (CIb), Bilthoven, the Netherlands 2. Utrecht University, Institute for Risk Assessment Sciences (IRAS), Utrecht, the Netherlands 3. National Institute for Public Health and the Environment (RIVM), Expert Centre for Methodology and Information Services (SIM), Bilthoven, the Netherlands 4. Utrecht University, Geosciences, Utrecht, the Netherlands Correspondence: Erwin Duizer (
[email protected]) Citation style for this article: Duizer E, Rutjes S, Husman A, Schijven J. Risk assessment, risk management and risk-based monitoring following a reported accidental release of poliovirus in Belgium, September to November 2014. Euro Surveill. 2016;21(11):pii=30169. DOI: http://dx.doi.org/10.2807/1560-7917.ES.2016.21.11.30169 Article submitted on 11 September 2015 / accepted on 07 January 2016 / published on 17 March 2016 On 6 September 2014, the accidental release of 1013 for production of inactivated polio vaccine (IPV). The infectious wild poliovirus type 3 (WPV3) particles by suspension was released into the sewage system, a vaccine production plant in Belgium was reported. discharged directly to a wastewater treatment plant WPV3 was released into the sewage system and dis- (WWTP) in Rosières and subsequently, following treat- charged directly to a wastewater treatment plant ment, into the river Lasne. The river Lasne is an affluent (WWTP) and subsequently into rivers that flowed to the of the river Dyle which is an affluent of the Schelde river Western Scheldt and the North Sea.