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Polio this week as of 28 August 2018

Countries
DR Congo
+ 7 more
Sources
GPEI
Publication date
Origin
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  • Summary of new viruses this week: Afghanistan – one new wild poliovirus type 1 (WPV1) case. Democratic Republic of the Congo ‒ Based on positive contacts, two negative AFP index cases classified as circulating vaccine-derived poliovirus type 2 (cVDPV2). Nigeria – three new cases of cVDPV2. Papua New Guinea – two new cases of circulating vaccine-derived poliovirus type 1 (cVDPV1). See country sections for more details.

  • To assess if the 2016 trivalent-bivalent oral polio vaccine “switch” was successful, a group of researchers from Imperial College London, WHO and the Bill & Melinda Gates Foundation analysed stool and sewage samples from 112 countries collected in the first 15 months after the switch. Study results were published this week in The New England Journal of Medicine. Read more.