(AGENPARL) - Roma, 28 Luglio 2023 - (AGENPARL) – ven 28 luglio 2023 No images? [Click here](https://worldhealthorganization.cmail20.com/t/d-e-vjljihl-iitylyihjr-p/)
Friday, 28 July 2023
[Disease Outbreak News](https://worldhealthorganization.cmail20.com/t/d-l-vjljihl-iitylyihjr-r/)
Circulating vaccine-derived poliovirus type 2 (cVDPV2)
Two Disease Outbreak News on Circulating vaccine-derived poliovirus type 2 (cVDPV2) were issued today, 28 July, on the United Republic of Tanzania and another on Kenya.
[Situation at a glance in Tanzania](https://worldhealthorganization.cmail20.com/t/d-l-vjljihl-iitylyihjr-y/)
On 4 July 2023, the Ministry of Health of the United Republic of Tanzania notified WHO of the detection of circulating vaccine-derived poliovirus type 2 (cVDPV2) in the country. The virus was isolated from a case of acute flaccid paralysis (AFP) in the Rukwa region, southwestern Tanzania bordering Lake Tanganyika to the west and Zambia to the south. Gene sequencing of the isolated virus has indicated close linkage with the [cVDPV2](https://worldhealthorganization.cmail20.com/t/d-l-vjljihl-iitylyihjr-j/) circulating in South Kivu, Demographic Republic of the Congo (DRC).1
The public health authorities of the Ministry of Health are conducting further field investigations including strengthening the AFP surveillance for the detection of additional AFP cases and subnational level immunity gap analysis to identify potential un-or under-immunized populations and/or areas to guide public health response activities.
WHO assesses the overall risk at the national level to be high due to the sub-optimal surveillance performance in some districts, sub-optimal vaccination coverage resulting in low population immunity and the ongoing population movement across neighbouring countries.
The DON in full: [https://www.who.int/emergencies/disease-outbreak-news/item/2023-DON480](https://worldhealthorganization.cmail20.com/t/d-l-vjljihl-iitylyihjr-t/)
[Situation at a glance in Kenya](https://worldhealthorganization.cmail20.com/t/d-l-vjljihl-iitylyihjr-i/)
On 11 July 2023, WHO received an official report regarding the detection of a circulating vaccine-derived poliovirus type 2 (cVDPV2) in two acute flaccid paralysis (AFP) cases and two asymptomatic healthy children community contacts from Hagadera refugee camp, in Kenya, the second largest refugee camp in the world with over 100 000 refugees.
The genetic sequencing analyses showed that all four isolates are genetically linked to the cVDPV2 circulating in Banadir, Somalia.
WHO assesses the overall risk at the national level to be high due to the overcrowded living conditions in the refugee camp, high rate of malnutrition, poor water and sanitation facilities, and frequent population movements with Somalia.
The DON in full: [https://www.who.int/emergencies/disease-outbreak-news/item/2023-DON479](https://worldhealthorganization.cmail20.com/t/d-l-vjljihl-iitylyihjr-d/)
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