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Polio this week - As of 09 May 2012
In the first four months of 2012, the lowest number of cases globally over a four-month period has been recorded over the past ten years, with 53 cases from four countries (the bulk of which – 95% – from the three remaining endemic countries). Only three cases have occurred from a non-endemic country (all from Chad, and none since February). At this time last year, 12 countries had reported 145 cases. More than 50% of this year’s cases are from Nigeria, which now constitutes the Global epicenter of polio transmission.
Wild Poliovirus (WPV) cases
Total cases |
Year-to-date 2012 |
Year-to-date 2011 |
Total in 2011* |
Globally |
53 |
145 |
650 |
- in endemic countries |
50 |
46 |
341 |
- in non-endemic countries |
3 |
99 |
309 |