The Weekly Epidemiological Record (WER) for 8 April 2011, vol. 86, 15 (pp 141–152) includes: Outbreak news – Outbreak of poliomyelitis, Republic of the Congo, September 2010–February 2011; Meningitis in Burkina Faso, Chad, Niger, Nigeria and Ghana: 2010 epidemic season

http://www.who.int/entity/wer/2011/wer8615.pdf