Vaccine Confirmed as Source of Polio Outbreakhttp://articles.mercola.com/sites/articles/archive/2002/03/30/polio-part-two.aspxA recent outbreak of the paralyzing viral infection polio in Haiti and the Dominican Republic has been traced to a strain of oral polio vaccine (OPV) that mutated back to virulence, according to international health officials. Based on genetic analysisenCommunityServer 2008.5 SP1 (Build: 31106.3070)