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. Read more on Equatorial Guinea, Ethiopia and Kenya.
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. Learn more about vaccine derived polioviruses here.
Wild poliovirus type 1 and Circulating vaccine-derived poliovirus cases
Total in 2014
- in endemic countries
- in non-endemic countries
Case breakdown by country
Onset of paralysis of most
Circulating vaccine-derived poliovirus cVDPV: Madagascar is cVDPV1, all others cVDPV2. NA: onset of paralysis in most recent case is prior to 2014. cVDPV is associated with ≥ 2 AFP cases or non-household contacts. VDPV2 cases with ≥ 6 (≥ 10 for type1) nucleotides difference from Sabin in VP1 are reported here.
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