This Week

Polio this week as of 10 August

Summary of new polioviruses this week:

  • Afghanistan: one WPV1 positive environmental sample
  • Pakistan: seven WPV1 positive environmental samples
  • Algeria: three cVDPV2 positive environmental samples
  • DR Congo: nine cVDPV2 cases
  • Ghana: one cVDPV2 positive environmental sample
  • Madagascar: seven cVDPV1 positive environmental samples
  • Mozambique: one cVDPV1 case
  • Yemen: 26 cVDPV2 cases

Weekly country updates as of 10 August 2022

  • No new wild poliovirus type 1 (WPV1) or circulating vaccine-derived poliovirus type 2 (cVDPV2) cases were reported this week. There is one WPV1 case reported in 2022 and four in 2021. The total number of cVDPV2 cases remains 43.
  • One WPV1 positive environmental sample was reported in Kunar.
  • No new wild poliovirus type 1 case was reported this week. The number of 2022 cases remains 14. In 2021, the number of WVP1 cases was one and the number of cVDPV2 cases was eight.
  • Seven WPV1 positive environmental samples were reported; four in Khyber Pakhtunkhwa, two in Punjab and one in Islamabad.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There is one case in 2022 that is linked to the Zamfara emergence from Nigeria.
  • Three cVDPV2 positive environmental samples were reported in Tamanghasset.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There are two cases in 2022 and three cases reported in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were two cases reported in 2021.  
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were three cases reported in 2021.

 

  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were no cases reported in 2021.

 

  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. The number of 2022 cases remains nine.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were two cases reported in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were no cases reported in 2021.
  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental samples were reported this week. There are 16 positive environmental samples reported in the country, all linked to the virus circulating in Yemen.
  • Following breakthrough transmission in the country, two nOPV2 NIDs will be implemented in September and October 2022.
  • Nine cases of circulating vaccine-derived poliovirus type 2 (cVDPV2) were reported; two in Maniema, six in Tanganyika and one in Haut Lomami bringing the number of cases in 2022 to 73. There were 28 cases in 2021.
  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental samples were reported this week. There are 16 positive samples reported in the country.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were ten cases reported in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There is one case in 2022 and one case reported in 2021.
  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental samples were reported this week. There were nine positive samples in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There is one case reported in 2022.
  • One cVDPV2 positive environmental sample was reported in Ashanti.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were six cases in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There are three cases in the country which are linked to the Jigawa outbreak in Nigeria in 2021.
  • No case of circulating vaccine-derived poliovirus type 3 (cVDPV3) was reported this week. There is one case reported in 2022.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were three cVDPV2 cases in 2021.
  • No case of circulating vaccine-derived poliovirus type 1 (cVDPV1) was reported this week. the number of cases in 2022 remains eight. There were 13 cases in 2021.
  • Seven cVDPV1 positive environmental samples were reported; two in Sud-Ouest, four in Boeni and one in Anosy.
  • No case of wild poliovirus type 1 (WPV1) was reported this week. One case from 2021 has been reported this year.
  • Malawi continues to participate in the multi-country, subregional outbreak response, to urgently stop the WPV1 outbreak affecting the area.

  

  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental sample was reported this week. There were seven positive samples linked to the Jigawa outbreak in 2021.

 

  • No case of wild poliovirus type 1 (WPV1) was reported this week. There are four WPV1 cases in the country. Reporting of these new cases within a short time span indicates that intensified surveillance efforts are working in the province.
  • Mozambique has implemented three immunization rounds using bOPV since the detection of the first case from March.  Assessments of these rounds show gradual improvements in quality, round to round, though quality remains suboptimal in Tete province.
  • A field investigation is ongoing in response to these latest cases, with focus on surveillance and to more clearly assess geographical scope of circulation, and to ultimately guide future response plans
  • One case of circulating vaccine-derived poliovirus type 1 (cVDPV1) was reported in Zambezia making it the second cVDPV1 case in 2022.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There are eight cases in 2022. There were 18 cases reported in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. The number of cases in 2022 remains 30. There were 415 cases reported in 2021.

 

  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were 17 cases reported in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were five cases reported in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There are two cases reported in 2022. There was one case reported in 2021.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were nine cVDPV2 cases reported in 2021.
  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental sample was reported this week. There was one positive sample reported this year in the country.

 

  • No circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental sample was reported this week. There were two positive samples linked to the N’Djamena outbreak in Chad reported in 2021.

 

  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were two cases reported in 2021.
  • 26 cases of circulating vaccine-derived poliovirus type 2 (cVDPV2) were reported; Dhamar (8), Sanaa City (4), Ibb (3), Sanaa (5), Hadramoat Almukllaa (1), Amran (3), Albaidah (2). The number of cVDPV2 cases in 2022 now stands at 80. There were 66 cVDPV2 cases and three cVDPV1 cases in 2021.
  • Almost two-thirds of the areas reporting the bulk of cVDPV2 cases have not implemented type 2-containing polio vaccination campaigns, underscoring the risk both to local children and to neighbouring countries.
  • Intensive efforts are ongoing to access Yemen’s northern governorates with polio vaccine.

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