Key result
No wild poliovirus cases have been detected in Nigeria since October 2016, though multiple outbreaks of circulating vaccine-derived poliovirus type 2 have emerged since 2018.
Why the study?
Despite the absence of detected wild poliovirus cases since October 2016, ongoing insurgency left children unreached, and circulating vaccine-derived poliovirus type 2 emerged and spread.
Population
Children in Nigeria, including 60,000 unvaccinated children in unreached settlements
Design
Surveillance and progress report
Follow-up
January 2018-May 2019
Authors
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Supports wild poliovirus interruption in Nigeria; leaves open optimal strategies for cVDPV2 outbreak control.
Observational
While wild poliovirus transmission may have been interrupted in Nigeria, ongoing outbreaks of circulating vaccine-derived poliovirus type 2 require improved vaccination campaign quality and access to insurgent-held areas.
Adamu et al. (2019) conducted an observational in Poliomyelitis. Oral poliovirus vaccine (OPV) campaigns was evaluated on Number of wild poliovirus (WPV) and circulating vaccine-derived poliovirus type 2 (cVDPV2) cases. No wild poliovirus cases have been detected in Nigeria since October 2016, though multiple outbreaks of circulating vaccine-derived poliovirus type 2 have emerged since 2018.
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