Polio this week as of 24 April 2019

Starting 24 April to 30 April 2019, World Immunization Week is celebrated across the world. This year’s theme is Protected Together: Vaccines Work!, which aims to spotlight the important role parents, communities, health workers, innovators and everyday vaccine heroes play in ensuring everybody benefits from the lifesaving vaccines.

Summary of new viruses this week: Afghanistan—three wild poliovirus type 1 (WPV1) cases and three WPV1-positive environmental samples; Pakistan—advance notification of two wild poliovirus type 1 (WPV1) cases and 13 WPV1-positive environmental samples; Nigeria—two circulating vaccine-derived type 2 (cVDPV2) cases and six cVDPV2-positive environmental samples; Democratic Republic of Congo — one cVDPV2 case and two cVDPV2 community isolates; Somalia—one cVDPV2 case and one cVDPV2 contact isolate. See country sections below for more details.