The Weekly Epidemiological Record (WER) 30 March 2012, vol. 87, 12 (pp 117–128) includes: Update on human cases of highly pathogenic avian influenza A(H5N1) virus infection, 2011; Performance of acute flaccid paralysis (AFP) surveillance and incidence of poliomyelitis, 2011.

http://www.who.int/entity/wer/2012/wer8713.pdf