The Controversial Smallpox Vaccine--Eighteen Points You Should Considerhttp://articles.mercola.com/sites/articles/archive/2002/10/26/smallpox-vaccine-part-nine.aspxBy Meryl Nass, MD 1. Smallpox is a serious disease and it would be great to prevent it. A very old vaccine exists, derived from the pustules of calf bellies inoculated with an old strain of -- we think -- a cowpox virus lost in antiquity. Edward JennerenCommunityServer 2008.5 SP1 (Build: 31106.3070)