Why the study?
This report updates previous reports describing global progress toward polio eradication during January 1, 2020 to April 30, 2022.
Population
Global population monitored for wild poliovirus and circulating vaccine-derived polioviruses
Design
Surveillance report
Authors
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Sustained vaccination needed in endemic areas; extends global surveillance data but leaves open final WPV1 interruption.
Significant progress has been made in reducing WPV1 cases, but circulating vaccine-derived polioviruses remain a global challenge requiring intensified outbreak responses.
Rachlin et al. (2022) studied this question.
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