Nature Medicine
March 2012, Volume 18 No 3 pp323-467
http://www.nature.com/nm/journal/v18/n3/index.html

Editorial
The persistence of polio
doi:10.1038/nm.2708

Despite intense efforts to rid the world of poliovirus, it continues to persevere. Given the serious limitations of the existing vaccines, the feasibility of eradication must be reassessed.