Why the study?
This report updates previous reports to describe global progress toward poliomyelitis eradication during January 1, 2017–March 31, 2019.
Population
Global population across countries reporting wild poliovirus and circulating vaccine-derived poliovirus cases
Design
Surveillance report
Follow-up
January 1, 2017-March 31, 2019
Authors
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Progress in polio surveillance supports eradication gains; leaves open sustained impact of bOPV switch in remaining endemic areas.
While WPV transmission is limited to a few countries, the increase in WPV1 cases in 2018 and ongoing cVDPV outbreaks underscore the need for intensified immunization and surveillance efforts.
Greene et al. (2019) studied this question.
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