Polio this week as of 31 July 2014
In Pakistan, three new cases have been reported, including one from Balochistan. It is the first case in this province since October 2012. However, four positive environmental samples were collected in 2014 from Quetta, Balochistan, the most recent of which on 20 June. This case is linked to these positive environmental samples, suggesting local circulation of WPV1 this year in this area.
In Nigeria, more cases due to circulating vaccine-derived poliovirus type 2 (cVDPV2) have been reported this year (18) than those due to wild poliovirus type 1 (5 WPV1). Four new cVDPV2 cases were reported this week alone.
Wild Poliovirus (WPV) cases
Total in 2013
- in endemic countries
- in non-endemic countries
Case breakdown by country
Date of most
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