<i>Notes from the Field</i>: Detection of Sabin-Like Type 2 Poliovirus from Sewage After Global Cessation of Trivalent Oral Poliovirus Vaccine — Hyderabad and Ahmedabad, India, August–September 2016

Abstract

During September 2-October 4, 2016, four sewage samples collected during August 3-September 19 (Hyderabad, Telangana State, India) and one sewage sample collected on August 30 (Ahmedabad, Gujarat State, India) tested positive for Sabin-like type 2 polioviruses. These polioviruses were detected approximately 4 months after April 25, 2016, when India officially ceased use of trivalent oral poliovirus vaccine (tOPV), containing Sabin attenuated types 1, 2, and 3 polioviruses, and switched to bivalent OPV (bOPV), containing Sabin attenuated types 1 and 3 polioviruses (1).