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Outbreak Updates
12 January 2026
Tanzania + Mwanza

CVDPV2 in Tanzania

As of 7 January 2026, two circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental samples were reported from specimens collected on 16 December 2025 in Mwanza. Please see our Topics in Brief article for further details on polio.

Source: GPEI Polio in brief
1
Take usual precautions
27 June 2025
Tanzania + Mwanza

CVDVP2 in Tanzania

As of 25 June 2025, one circulating vaccine-derived poliovirus type 2 (cVDPV2) positive environmental sample was reported this week. This sample was collected on 19 May 2025 in Mwanza. Please see our Topics in Brief article for further details on polio.

Source: GPEI Polio in brief
Take usual precautions

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