Progress Toward Polio Eradication — Worldwide, 2013–2014

Edna K. Moturi, MBChB; Kimberly A. Porter, PhD; Steven G.F. Wassilak, MD; Rudolf H. Tangermann, MD; Ousmane M. Diop, PhD; Cara C. Burns, PhD; Hamid Jafari, MD


Morbidity and Mortality Weekly Report. 2014;63(21):468-472. 

In This Article

Countries With Polio Outbreaks

The number of WPV cases in outbreaks after WPV importation into previously polio-free countries increased from six cases in two countries (Chad and Niger) in 2012 to 256 cases in five countries in 2013 (Figure). Importation of WPV1 from Nigeria into the Horn of Africa resulted in 217 cases in 2013 (nine in Ethiopia, 14 in Kenya, and 194 Somalia); one outbreak case was reported by Ethiopia in 2014. Importation from Pakistan into Syria resulted in 35 cases in 2013 and one case in 2014; in 2014, a WPV case in Iraq resulted from WPV imported from Syria. Four WPV1 cases were reported in Cameroon in 2013 and three in 2014, and three cases were reported in Equatorial Guinea in the first quarter of 2014 ( Table 2 ). On genomic sequence analysis, the isolates were of Nigerian origin most closely linked with WPV cases reported from Chad in 2012.


Number of wild poliovirus cases among countries with endemic polio and regions with recent polio outbreaks, by month and year of onset — January 2012–April 2014.*
* Data as of May 20, 2014.