This Week

Polio this week as of 28 June 2022

Headlines

  • Afghanistan earthquake: Polio network supporting earthquake response in Afghanistan. See ‘Afghanistan’ section below for more.
  • Global leaders at the G7 and Commonwealth leaders meetings this week call for strengthened support to end polio once and for all.
  • ARCC outcomes – As south-east Africa continues to intensify efforts to stop a wild poliovirus type 1 (WPV1) outbreak detected in Malawi in February, the Africa Regional Certification Commission for Polio Eradication (ARCC) – the independent regional advisory body guiding Africa’s eradication effort – called for urgent action to stop all forms of poliovirus affecting the continent. More here.
  • SAGE and IHR EC reports published: the final reports of the April 2022 meeting of the Strategic Advisory Group of Experts on immunization (SAGE) and the June 2022 meeting of the IHR Emergency Committee on polio have been published online.
  • This week, the Global Commission for Certification of Poliomyelitis Eradication (GCC) is meeting in-person in Geneva, to further review and evaluate global criteria for certification. Outcomes of the group’s meeting will be published in its report at www.polioeradication.org.
  • nOPV2 rollout: Approximately 370 million doses of nOPV2 have been administered across 21 countries under its WHO Emergency Use Listing (EUL) to date. An additional 17 countries have met the requirements for nOPV2 use in the event of an outbreak. For more information on nOPV2, visit: www.polioeradication.org/nOPV2

Summary of new polioviruses this week:
– Pakistan: one WPV1 case and one positive environmental sample
– Benin: one cVDPV2 positive environmental sample
– Djibouti: two cVDPV2 positive environmental samples
– Niger: two cVDPV2 cases and one positive environmental sample
– Nigeria: one cVDPV2 case and one positive environmental sample
– Somalia: one cVDPV2 positive environmental sample
– Yemen: four cVDPV2 positive environmental samples

Weekly country updates as of 28 June 2022

  • No new WPV1 or cVDPV2 viruses 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 case was reported in Khyber Pakhtunkhwa bringing the number of 2022 cases to 11. There was one WPV1 case in 2021. The total number of cVDPV2 cases remains eight.
  • One WPV1 positive environmental sample was reported in Khyber Pakhtunkhwa.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were three cases reported in 2021.
  • One cVDPV2 positive environmental sample was reported in Borgou.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were two cases reported in 2021.
  • One cVDPV2 positive environmental sample was reported in Ouagadougou.
  • 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 five.
  • 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.
  • Two cVDPV2 positive environmental samples were reported in Arta. There are 16 positive environmental samples reported in the country, all linked to the virus circulating in Yemen.
  • 15 cases of circulating vaccine-derived poliovirus type 2 (cVDPV2) were reported; 12 in Maniema, two in Sud-Kivu and one in Tanganyika. The number of 2022 cases now stands at 63. There were 28 cases in 2021.
  • The outbreak is affecting primarily the east of the country, and the risk of further expansion of the outbreak is compounded by a significant number of zero-dose children in the area.
  • No cVDPV2 positive environmental samples were reported this week. There are 16 positive samples reported in the country.
  • An internal surveillance review is scheduled for this month, as part of preparations for the expected Outbreak Response Assessment.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were ten cases reported in 2021.
  • No cVDPV2 was reported this week.  There is one case reported in 2021.
  • No cVDPV2 positive environmental samples were reported this week. There were nine positive samples in 2021.
  • No cVDPV2 positive environmental samples were reported this week. There are four positive samples reported in 2022.  
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There are 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 the country in 2022.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were three cVDPV2 cases in 2021.
  • No cases of circulating vaccine-derived poliovirus type 1 (cVDPV1) were reported this week. The number of 2022 cases remains five. There were 13 cases in 2021.
  • Two cVDPV1 positive environmental samples were reported; one each in Analamanga and Diana.
  • No case of WPV1 was reported this week. One case was reported for 2021.
  • Following the first two of a series of multi-country outbreak response campaigns implemented in March and April/May, preparations are ongoing in both Malawi and neighbouring countries for the subsequent campaigns.
  • In total, at least four, multi-country campaigns will be implemented.
  • No cVDPV2 positive environmental sample was reported this week. There were seven positive samples linked to the Jigawa outbreak in 2021.
  • No WPV1 cases were reported this week.  In 2022, one WPV1 case has been reported.
  • The Government of Mozambique continues to respond to both WPV1 and cVDPV2 in the country.
  • Two cases of circulating vaccine-derived poliovirus type 2 (cVDPV2) were reported in Tillaberi bringing the number of 2022 cases to four. There were 17 cases reported in 2021.
  • One cVDPV2 positive environmental sample was reported in Niamey.
  • One case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported in Zamfara bringing the number of 2022 cases to 27. There were 415 cases reported in 2021.
  • One cVDPV2 positive environmental sample was reported in Katsina. 
  • No cVDPV3 positive environmental samples were reported this week.
  • 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.
  • One cVDPV2 positive environmental sample was reported in Banadir.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. There were 9 cVDPV2 cases reported in 2021.
  • No cVDPV2 positive environmental sample was reported this week. There was one sample reported last week, the first in the country.
  • No 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.
  • No cases of circulating vaccine-derived poliovirus type 2 (cVDPV2) were reported this week. The number of cVDPV2 cases in 2022 remains 45. There were 66 cVDPV2 cases and three cVDPV1 cases in 2021.
  • Four cVDPV2 positive environmental samples were reported; one each in Sanaa city and Aden and two in Alhudaidah.
  • Almost two-thirds of the areas reporting the bulk of cVDPV2 cases have not implemented any type 2-containing polio vaccination campaign, 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.