The Weekly Epidemiological Record (WER) for 25 April 2014, vol. 89, 17 (pp. 165–176) includes:
:: Surveillance systems to track progress towards global polio eradication, 2012–2013
:: Performance of acute flaccid paralysis (AFP) surveillance and incidence of poliomyelitis, 2014
http://www.who.int/entity/wer/2014/wer8917.pdf?ua=1