A CDC framework for preventing infectious diseases. United States Centers for Disease Control and Prevention. October 2011. «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».
«Vaccines and Infectious Diseases: Putting Risk into Perspective». American Medical Association Briefing on Microbial Threats. National Press Club Washington, DC. 1 de junio de 2000. Archivado desde el original el 24 de noviembre de 2010. «Vaccines are the most effective public health tool ever created.»
«Vaccine-preventable diseases». Public Health Agency of Canada. Archivado desde el original el 24 de marzo de 2012. «Vaccines still provide the most effective, longest-lasting method of preventing infectious diseases in all age groups».
«Vaccines and Infectious Diseases: Putting Risk into Perspective». American Medical Association Briefing on Microbial Threats. National Press Club Washington, DC. 1 de junio de 2000. Archivado desde el original el 24 de noviembre de 2010. «Vaccines are the most effective public health tool ever created.»
«Vaccine-preventable diseases». Public Health Agency of Canada. Archivado desde el original el 24 de marzo de 2012. «Vaccines still provide the most effective, longest-lasting method of preventing infectious diseases in all age groups».