http://articles.mercola.com/sites/articles/archive/2006/09/02/more-evidence-vaccines-worsen-the-avian-flu.aspxVaccinating poultry could actually make the spread of deadly strains of bird flu such as H5N1 worse. An Edinburgh University study concluded that, unless 95 percent of a given flock has been protected, the disease is more likely to spread. The study uenCommunityServer 2008.5 SP1 (Build: 31106.3070)