Update on Vaccine-Derived Poliovirus Outbreaks — Worldwide, January 2023–June 2024
MMWR. Morbidity and Mortality Weekly Report·
- DOI
- 10.15585/mmwr.mm7341a1
- PMID
- 39418214
- PMCID
- PMC11486351
- OpenAlex
- W4403483810
- Study type
- Journal article
- Publisher
- Centers for Disease Control MMWR Office
- Article type
- journal-article
- Integrity
- current
Why this research matters now
The report underscores that cVDPVs cause paralytic polio and asymptomatic transmission in undervaccinated communities, requiring timely resource allocation and high-quality outbreak responses to prevent international spread and achieve transmission control.
Structured evidence summary
Research question
This surveillance report describes the global distribution and characteristics of circulating vaccine-derived poliovirus outbreaks between January 2023 and June 2024.
Study design
Descriptive epidemiological analysis using WHO Polio Information System data and Global Polio Laboratory Network surveillance records.
Population and setting
The analysis covered 39 countries or areas worldwide, predominantly in Africa, with particular focus on areas with undervaccinated child populations and security-compromised regions including Nigeria and Somalia.
Main findings
Seventy-four cVDPV outbreaks were detected across 39 countries between January 2023 and June 2024, with 47 being newly identified outbreaks. Three countries reported cVDPV1 and 38 reported cVDPV2, including 70 distinct cVDPV2 outbreaks. In 15 countries, transmission persisted beyond one year into 2024, with persistent Nigerian and Somali outbreaks spreading internationally due to delayed or low-quality outbreak response campaigns.
Public-health relevance
The report underscores that cVDPVs cause paralytic polio and asymptomatic transmission in undervaccinated communities, requiring timely resource allocation and high-quality outbreak responses to prevent international spread and achieve transmission control.
Important limitations
This summary relies on the supplied single-article abstract and metadata. The original paper is required for decision-grade interpretation of surveillance methods, case definitions, laboratory confirmation criteria, and response evaluation metrics.
GIDS interpretation
The article appears in MMWR and is tagged for poliomyelitis, outbreak investigation, and vaccination, making it discoverable in systems tracking vaccine-preventable disease surveillance and outbreak response globally.
Related GIDS surveillance
Literature context does not validate, explain, or change a surveillance signal. Exact and contextual relationships are shown separately.
Evidence relationships
This article has 11 auditable classifier relationships to diseases, places, topics, and study design.