Polio this week as of 8 February 2017

Polio this week as of 8 February 2017

• As the low season for poliovirus transmission continues, the first wild poliovirus case from acute flaccid paralysis (AFP) in the calendar year 2017 is reported from Afghanistan. Wild poliovirus type 1 positive samples from 2017 had previously been reported from environmental samples in Pakistan. Both countries continue to intensify their eradication efforts to urgently interrupt any residual virus transmission.

• Summary of newly-reported viruses this week (see country-specific sections below for further details): Afghanistan – one wild poliovirus type 1 (WPV1) case; Pakistan – three WPV1 positive environmental samples.

NA: onset of paralysis in most recent case is prior to 2015. Figures exclude non-AFP sources. Lao PDR cVDPV1, all others cVDPV2. cVDPV definition: see document “Reporting and classification of vaccine-derived polioviruses” at [pdf]