By NewsDesk  @infectiousdiseasenews

The Global Polio Eradication Initiative (GPEI) announced that a circulating vaccine-derived poliovirus type 1 (cVDPV1) outbreak has been declared in Yemen.

Yemen map/L’Américain

Fifteen cVDPV1 cases were reported this week. These genetically-linked VDPV1 were isolated from 14 AFP cases, with onset of paralysis ranging from 31 January to 18 June 2020 (with a further AFP case from June 2019 retrospectively confirmed).

The cases are from different districts of Saada Governorate, a relatively densely populated area, which has also been affected in the past by conflict and access issues,in the north-west of the country.

Officials say the isolates have 17-24 Nt changes from Sabin 1, suggesting circulation of potentially up to two years.

WHO and UNICEF are supporting local health authorities to plan and launch an effective outbreak response to limit virus spread.

Elsewhere, wild poliovirus type 1 (WPV1) cases were reported in Afghanistan (3) and Pakistan (2), bringing the country totals to 37 and 65 cases, respectively.

Lastly, nine circulating vaccine-derived poliovirus type 2 (cVDPV2) were reported in four African nations–Cote d’Ivoire, Nigeria, Somalia and Sudan.