http://articles.mercola.com/sites/articles/archive/2000/04/30/chickepox-vaccine.aspxAmericans of a certain age can remember what it was like when polio ran rampant through the land. Swimming pools and play lots occasionally were abandoned, as people feared transmission of the devastating virus from which there was no protection. HealthyenCommunityServer 2008.5 SP1 (Build: 31106.3070)