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United States Centers for Disease Control and Prevention (2011).A CDC framework for preventing infectious diseases.(ארכיווירט 29.08.2017 ביי דערWayback Machine) צוגעטראטן 11 סעפטעמבער 2012. "Vaccines are our most effective and cost-saving tools for disease prevention, preventing untold suffering and saving tens of thousands of lives and billions of dollars in healthcare costs each year."
Public Health Agency of Canada.Vaccine-preventable diseases.(ארכיווירט 13.03.2015 ביי דערWayback Machine) צוגעטראטן 11 סעפטעמבער 2012. "Vaccines still provide the most effective, longest-lasting method of preventing infectious diseases in all age groups."
