Wild poliovirus is increasing in endemic countries — and re-emerging in non-endemic countries, with cases increasing by more than 250% since 2023 in Afghanistan and Pakistan. Furthermore, suboptimal vaccination coverage is driving up vaccine-derived poliovirus (VDPV) outbreaks. Historically rare, VDPV outbreaks are occurring in 41 countries largely due to decreased vaccinations and increased vaccine hesitancy.

Read why taking global action again polio is critical in this edition of Outbreak Insider.

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