ACP Immunization Portal by the American College of Physicians.

Adolescentvaccination.org by the National Foundation for Infectious Diseases. The site reflects United States immunization policy and is intended for United States residents.

AIM enables immunization managers to work together to effectively prevent and control vaccine-preventable diseases and improve immunization coverage in the United States and its territories.

Vaccines by the Better Health Channel (BHC), Channel provides health and medical information to help individuals and their communities improve their health and wellbeing. From the State Government of Victoria, Australia.

Immunization by the European Centre for Disease Prevention and Control (ECDC). ECDC's mission is to identify, assess and communicate current and emerging threats to human health posed by infectious diseases.

Vaccination Programs for Infants and Children by the Government of Canada.

Immunizations by HealthyChildren.org. A parenting website committed to the attainment of optimal physical, mental, and social health and well-being for all infants, children, adolescents, and young adults. From the American Academy of Pediatrics.

IAC works to increase immunization rates and prevent disease by creating and distributing educational materials for health professionals and the public that enhance the delivery of safe and effective immunization services. IAC also facilitates communication about the safety, efficacy, and use of vaccines within the broad immunization community of patients, parents, health care organizations, and government health agencies.

Immunization / Vaccination by MedlinePlus. Produced by the U.S. National Library of Medicine, bringing you information about diseases, conditions, and wellness issues in language you can understand.

Immunizations by Oklahoma State Department of Health.

Immunization by PMC, free full text biomedical and life science journal articles. A service from the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM).

Immunization biomedical literature citations and abstracts from MEDLINE by PubMed, life science journals and online books. A service from the U.S. National Library of Medicine.

The History of Vaccines by The College of Physicians of Philadelphia.

Immunization by UNICEF, United Nations International Children's Emergency Fund.

Vaccines.gov, this resource is the U.S. federal gateway to information on vaccines and immunization for infants, children, teenagers, adults, and seniors.

Vaccines by The World Health Organization (WHO). The organization's primary role is to direct and coordinate international health within the United Nations’ system.

Vaccination by WikiGenes. WikiGenes is a non-profit initiative to provide a global collaborative knowledge base for the life sciences, where authorship matters.