Polio this week

Headlines

  • The thirty-eighth meeting of the Emergency Committee under the International Health Regulations (2005) (IHR) on the international spread of poliovirus was convened by the WHO Director-General on 20 March 2024 to review the data on wild poliovirus (WPV1) and circulating vaccine-derived polioviruses (cVDPV) in the context of the global target of interruption and certification of WPV1 eradication by 2026 and interruption and certification of cVDPV2 elimination by 2028. Read the Committee’s report here.

Summary of new poliovirus this week

  • DR Congo: one cVDPV1 case
  • Chad: one cVDPV2 case
  • Nigeria: one cVDPV2 case

Country updates as of 17 April 2024

  • No WPV1 cases were reported this week. There are two cases reported this year. The total number of cases in 2023 remains six.
  • No WPV1-positive environmental samples were reported this week.
  • No WPV1 cases were reported this week. There are two cases reported this year while the number of 2023 cases remains six.
  • No WPV1-positive environmental samples were reported this week.
  • No cVDPV2 cases were reported this week. There were three cases reported in 2022.
  • No cVDPV2-positive environmental sample was reported this week.
  • No cVDPV2 cases have been reported since February 2020.
  • No cVDPV2-positive environmental sample was reported this week.
  • No cVDPV2 cases were reported this week. There are 3 cases reported in 2023.
  • No cVDPV2-positive environmental sample was reported this week.
  • No cVDPV2 positive environmental samples were reported this week.
  • No cVDPV2 cases were reported this week. The number of 2023 cases remains three.
  • No cVDPV2-positive environmental samples were reported this week.
  • No cVDPV2 cases were reported this week. There was one case reported in 2023 and one in 2022.
  • No cVDPV2 cases were reported this week.
  • No cVDPV2-positive environmental samples were reported this week.
  • In August 2022, cVDPV2 was isolated from two environmental samples from a large wastewater treatment plant and a target site in the city of Montreal, Quebec. This was after the country conducted retrospective analysis of wastewater samples. Genetic sequencing confirmed linkage to the cVDPV2 case from New York, USA.
  • No cVDPV2 cases were reported this week. There have been 14 cases reported in 2023 and six cases in 2022.
  • One cVDPV2 case was reported this week in Mandoul, making it the first this year. The number of 2023 cases remains 55.
  • No cVDPV2-positive environmental sample was reported this week.
  • No cVDPV2-positive environmental samples were reported this week.
  • No cVDPV2 case was reported this week. There are 6 cases reported in 2023.
  • No cVDPV2-positive environmental sample was reported this week.
  • There are no polio cases reported in the country.
  • No cVDPV2-positive environmental samples were reported this week.  
  • One cVDPV1 case was reported this week in Haut-Katanga, making it the first this year. The number of 2023 cases remains 106.
  • No cVDPV2 cases were reported this week. The number of 2023 cases remains 117.
  • No cVDPV2-positive environmental samples were reported this week.
  • There are no polio cases reported in the country.
  • No cVDPV2-positive environmental sample was reported this week.
  • No cVDPV2 cases were reported this week. There was one case reported in 2022.
  • No cVDPV2 case was reported this week. There was one case reported in 2022.
  • No cVDPV2 case was reported this week. There were three cases reported in 2022.
  • No cVDPV2 cases were reported this week. There is one case in 2024. The number of 2023 cases remain 47.
  • No cVDPV2-positive environmental samples were reported this week.
  • No cVDPV2 cases were reported this week. The total number of 2023 cases remain 6.
  • No cVDPV2-positive environmental sample was reported this week.
  • No cVDPV2 cases were reported this week. There has been one cVDPV2 case reported last year.
  • No cVDPV2 cases were reported this week. There have been eight cases reported last year.
  • No cVDPV2-positive environmental samples were reported this week.
  • No cVDPV2-positive environmental sample was reported this week.
  • No virus was reported this week.  The total number of cVDPV1 cases for 2023 remains 24.
  • No cVDPV1 cases were reported this week. There were four cases reported in the country in 2022.
  • No WPV1 cases were reported in 2023.
  • No cVDPV2 cases were reported this week. There have been 15 cases reported in 2023 and one in 2024.
  • No cVDPV2 cases were reported this week. There was one case reported in 2023.
  • No cVDPV2-positive environmental sample was reported this week.
  • No cVDPV1 case was reported this week. The number of 2023 cases remains four.
  • No cVDPV2 case was reported this week. There was one case reported in 2023.
  • No cVDPV2 cases were reported this week. There were two cases reported in 2023.
  • One cVDPV2 case was reported this week in Kebbi, making it the eighth case this year. There are 87 cases reported in 2023.
  • No cVDPV2-positive environmental samples were reported this week.
  • No cVDPV2-positive environmental sample was reported this week.
  • The last cVDPV2 case in the country was in October 2021.
  • No cVDPV2-positive environmental sample was reported this week.
  • No cVDPV2 cases were reported this week. There is one case in 2024 and eight cases from 2023.
  • No cVDPV2 cases were reported this week. There is one case reported this year and three cases from last year.
  • No cVDPV2 cases were reported this week. There was one case reported in 2022.
  • No cVDPV2-positive environmental samples were reported this week.
  • No cVDPV2 cases were reported this week. The total number of cases for 2023 remains two.
  • No cVDPV2-positive environmental samples were reported this week.
  • In May 2022, six positive samples were reported following the isolation of vaccine-derived poliovirus type 2 (VDPV2) from environmental samples in London, UK. No cases of paralysis associated with this strain have been detected – virus has been isolated only from environmental (sewage) samples.
  • No cVDPV2 cases were reported this week. One case was reported in New York in September 2022.
  • No cVDPV2 positive environmental samples were reported this week. There were 30 positive samples reported in 2022.
  • No cVDPV2 cases were reported this week. There is one case in 2024 and eight cases reported in 2023.
  • No cVDPV2 cases were reported this week. There was one case reported last year.
  • No cVDPV2 cases were reported this week. There is one case reported in 2023.
  • No cVDPV2 positive environmental samples were reported this week.

For more country information, please visit the respective pages within the Outbreak and Endemic country sections of the GPEI website.