Polio this week as of 1 July 2015
In June, the wild poliovirus outbreaks in Equatorial Guinea, Ethiopia and Kenya were assessed to be over by independent teams, having successfully interrupted transmission of the virus. While this is a sign that supplementary immunization activities and acute flaccid paralysis have been strengthened since all of the outbreaks began in 2013, it is essential for these gains to be maintained and built upon in order to protect children within these countries from the return of the virus.
Five cases of circulating vaccine derived poliovirus type 1 (cVDPV1) have been reported in Madagascar, with dates of onset of paralysis in April and May 2015. These cases are genetically linked to that from September 2014, indicating prolonged and widespread circulation of the virus. The emergency outbreak response is now being intensified to build immunity against the virus in the country, as 25 % of children across Madagascar remain un- or under- immunized.
Wild poliovirus type 1 and Circulating vaccine-derived poliovirus cases
Total cases
|
Year-to-date 2015
|
Year-to-date 2014
|
Total in 2014
|
WPV
|
cVDPV
|
WPV
|
cVDPV
|
WPV
|
cVDPV
|
Globally
|
29
|
6
|
111
|
26
|
359
|
55
|
- in endemic countries
|
29
|
1
|
99
|
26
|
340
|
52
|
- in non-endemic countries
|
0
|
5
|
12
|
0
|
19
|
3
|