Polio Headlines 23 November, 2022

 
Afghanistan, Pakistan and Mozambique numbers are leveling off, indicating that enhanced monitoring & response efforts are working.
 

Wild Polio Virus Summary:

·      
Summary  of new polioviruses this week:

·       Afghanistan: three WPV1 positive environmental samples

·       Algeria: four cVDPV2 positive environmental samples

·       Chad: four cVDPV2 cases

·       DR Congo: three cVDPV2 cases

·       Ethiopia: two cVDPV2 cases

·       Nigeria: four cVDPV2 cases and two cVDPV2 positive environmental samples


Afghanistan:

  • No wild poliovirus type 1 (WPV1) cases were reported this week. There are two cases reported in 2022. There were four cases in 2021.
  • Three WPV1 positive environmental samples were reported this week and collected in Nangarhar. The total number of WPV1 positive environmental samples in 2022 is eleven, all from Eastern Region.

 
Pakistan: 

  • No wild poliovirus type 1 (WPV1) cases were reported this week. There are 20 cases in 2022. There was one WPV1 case in 2021.

Mozambique: 

  • No wild poliovirus type 1 (WPV1) case was reported this week. There are eight cases reported in 2022. Reporting of these new cases within a short time span indicates that intensified surveillance efforts are working in the province.  
  • No cases of circulating vaccine-derived poliovirus type 1 (cVDPV1) were reported this week. There are 16 cases in 2022.
  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. The number of cases in 2022 remains four. There were two cases reported in 2021.


United States of America:

  • No case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was reported this week. One cVDPV2 case was reported in New York, with onset of paralysis on 20 June. 

Officially reported WPV1 and cVDPV cases as of 22 November 2022
Wild poliovirus (WPV) 
Total global WPV1 cases in 2022: 30 (compared with 2 for the same period in 2021)
Total global WPV1 cases in 2021: 6
Circulating vaccine-derived poliovirus (cVDPV) cases

Total global cVDPV cases in 2022: 522 (compared with 466 for the same period in 2021)
Total global cVDPV cases in 2021: 698