Last data update: Sep 23, 2024. (Total: 47723 publications since 2009)
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Query Trace: Snidera CJ [original query] |
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Surveillance to track progress towards polio eradication - worldwide, 2020-2021
Wilkinson AL , Diop OM , Jorba J , Gardner T , Snidera CJ , Ahmed J . Wkly Epidemiol Rec 2022 97 157-168 Less than 99.99% of recorded cases of poliomyelitis have occurred since the Global Polio Eradication Initiative (GPEI) was established in 1988. By the end of 2021, only Afghanistan and Pakistan will still have endemic wild poliovirus (WPV). While Malawi reported a case of wild poliovirus type 1 (WPV1) with paralysis onset in 2021, just over a year after the WHO African Region (AFR) was proclaimed WPV-free, 31 nations reported incidences of circulating vaccine-derived poliovirus (cVDPV) between 2020 and 2021. Monitoring for acute flaccid paralysis (AFP) in people under the age of 15 is the main way to identify poliovirus transmission, and confirmation comes from testing stool samples at WHO-accredited labs. In all WHO regions in 2020, the COVID-19 pandemic had an impact on polio vaccination and surveillance; from January to September 2020, fewer AFP cases were reported, and there was a longer delay between collecting stools and labs receiving them than there had been during the same period in 2019. A significant increase from 2020, when only 23 (53%) of the priority countries attained the national targets for the two key surveillance performance metrics, was shown in 2021. High-performance surveillance is necessary to track the spread of the poliovirus. Gaps in surveillance indicators might be found, improvements could be made, and the overall sensitivity and promptness of poliovirus detection might be enhanced in order to successfully eradicate polio. The collection of adequate stool specimens8 from AFP patients, with a target of 80% adequate stool specimens, and the nonpolio AFP (NPAFP) rate, which is a rate of 2 per 100,000 people aged 15 years and considered sufficiently sensitive for detecting circulating poliovirus, are two key performance indicators used to assess the quality of AFP surveillance. 43 priority nations experiencing or at high risk of poliovirus transmission were the subject of an analysis of surveillance indicators as of 25 March 2022. |
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