Bill Gates speaks of world's difficult fight to eradicate polio

Bill Gates has given a lecture in London in which he described the battle to
eradicate polio as one of the most difficult tasks the world has ever faced.The
billionaire Microsoft chairman, who launched the Bill and Melinda Gates
Foundation, believes that society needs to act quickly, describing the mission
as [...]
Source:
http://www.ezonearticle.com/2013/01/29/bill-gates-speaks-of-worlds-difficult-fight-to-eradicate-polio/