Vaccine hesitancy is a delay in acceptance, or refusal, of vaccines despite the availability of vaccine services and supporting evidence. The term covers refusals to vaccinate, delaying vaccines, accepting vaccines but remaining uncertain about their use, or using certain vaccines but not others. Although adverse effects associated with vaccines are occasionally observed, the scientific consensus that vaccines are generally safe and effective is overwhelming. Vaccine hesitancy often results in disease outbreaks and deaths from vaccine-preventable diseases. Therefore, the World Health Organization characterizes vaccine hesitancy as one of the top ten global health threats.
The National Vaccine Information Center (NVIC), founded under the name Dissatisfied Parents Together (DPT) in 1982, is an American 501(c)(3) organization that has been widely criticized as a leading source of fearmongering and misinformation about vaccines. While NVIC describes itself as the "oldest and largest consumer-led organization advocating for the institution of vaccine safety and informed consent protections", it promotes false and misleading information including the discredited claim that vaccines cause autism, and its campaigns portray vaccination as risky, encouraging people to consider "alternatives." In April 2020, the organization was identified as one of the greatest disseminators of COVID-19 misinformation on Facebook.
Vaccination and religion have interrelations of varying kinds. No major religion prohibits vaccinations, and some consider it an obligation because of the potential to save lives. However, some people cite religious adherence as a basis for opting to forego vaccinating themselves or their children. Many such objections are pretextual: in Australia, anti-vaccinationists founded the Church of Conscious Living, a "fake church", leading to religious exemptions being removed in that country, and one US pastor was reported to offer vaccine exemptions in exchange for online membership of his church.
Paul Allan Offit is an American pediatrician specializing in infectious diseases, vaccines, immunology, and virology. He is the co-inventor of a rotavirus vaccine. Offit is the Maurice R. Hilleman Professor of Vaccinology, professor of pediatrics at the Perelman School of Medicine at the University of Pennsylvania, former chief of the Division of Infectious Diseases (1992–2014), and the director of the Vaccine Education Center at the Children's Hospital of Philadelphia.
Claims of a link between the MMR vaccine and autism have been extensively investigated and found to be false. The link was first suggested in the early 1990s and came to public notice largely as a result of the 1998 Lancet MMR autism fraud, characterised as "perhaps the most damaging medical hoax of the last 100 years". The fraudulent research paper, authored by Andrew Wakefield and published in The Lancet, falsely claimed the vaccine was linked to colitis and autism spectrum disorders. The paper was retracted in 2010 but is still cited by anti-vaccine activists.
A vaccination policy is a health policy adopted in order to prevent the spread of infectious disease. These policies are generally put into place by state or local governments, but may also be set by private facilities, such as workplaces or schools. Many policies have been developed and implemented since vaccines were first made widely available.
The Autism Community in Action (TACA) is a nonprofit organization founded in 2000 by Lisa Ackerman and based in Irvine, California. The mission statement is "TACA provides education, support and hope to families living with autism". As of 2023, there are 41 chapters of TACA throughout the United States.
Andrew Jeremy Wakefield is a British fraudster, discredited academic, anti-vaccine activist, and former physician.
The Australian Vaccination-risks Network Inc., formerly known as the Australian Vaccination-Skeptics Network (AVsN), and before that known as the Australian Vaccination Network (AVN), is an Australian anti-vaccination pressure group registered in New South Wales. As Australia's most controversial anti-vaccination organisation, it has lobbied against a variety of vaccination-related programs, downplayed the danger of childhood diseases such as measles and pertussis, championed the cause of alleged vaccination victims, and promoted the use of ineffective alternatives such as homeopathy.
Robert William Sears, known as Dr. Bob, is an American pediatrician from Capistrano Beach, California, noted for his unorthodox and dangerous views on childhood vaccination. While Sears acknowledges the efficacy of vaccines—for instance, he supports the claim that Chicken pox, measles, whooping cough, polio, diphtheria have all disappeared because of vaccines—he has proposed alternative vaccination schedules that depart from accepted medical recommendations. His proposals have enjoyed celebrity endorsement but are not supported by medical evidence and have contributed to dangerous under-vaccination in the national child population. While he denies being anti-vaccine, Sears has been described by many as anti-vaccine and as a vaccine delayer.
Jay N. Gordon is an American pediatrician, lecturer, and author. He is well-known within the anti-vaccine movement for his promotion of vaccine hesitancy. He does encourage vaccinating but at the discretion of the parent. He is also a long-time advocate of breastfeeding; he became a member of the International Health Advisory Council of the La Leche League in 2005.
Texans for Vaccine Choice (TFVC) is an anti-vaccine Facebook group turned political action committee in Texas which advocates for personal belief exemptions to vaccination requirements, based on "a collection of fake news, half- truths, and conspiracy theories". Andrew Wakefield, the disgraced former medical researcher and originator of the MMR autism hoax, and infectious disease specialist Peter Hotez, both describe TFVC's lobbying as very effective, with the rate of Texas students opting out of at least one vaccine at least doubling in around five years and over 50,000 Texas schoolchildren not being vaccinated.
In early months of 2019, a measles outbreak occurred in the Portland metropolitan area, including the Clark County, Washington suburbs, in the United States. At the time, the outbreak was the largest outbreak in more than two decades; outbreaks in 2019 in areas including Brooklyn and Rockland County, New York have since seen far greater numbers of cases.
Extensive investigation into vaccines and autism spectrum disorder has shown that there is no relationship between the two, causal or otherwise, and that vaccine ingredients do not cause autism. The American scientist Peter Hotez researched the growth of the false claim and concluded that its spread originated with Andrew Wakefield's fraudulent 1998 paper, and that no prior paper supports a link.
Vaccine Choice Canada (VCC) is Canada's main anti-vaccination group. It was founded in the 1980s under the name Vaccination Risk Awareness Network (VRAN) and adopted its current name in 2014. The group has been contributing to vaccine hesitancy in Canada, encouraging citizens to forgo immunization and legislators to support anti-vaccine regulations and legislation.
Measles was declared eliminated from the United States in 2000 by the World Health Organization due to the success of vaccination efforts. However, it continues to be reintroduced by international travelers, and in recent years, anti-vaccination sentiment has allowed for the reemergence of measles outbreaks.
Del Matthew Bigtree is an American television and film producer who is the CEO of the anti-vaccination group Informed Consent Action Network. He produced the film Vaxxed: From Cover-Up to Catastrophe, based on the discredited opinions of Andrew Wakefield, and alleges an unsubstantiated connection between vaccines and autism. He served as communications director for Robert F. Kennedy Jr.'s 2024 presidential campaign and subsequently took a leading role in two groups associated with Kennedy's political career.
Vaccination policy of the United States is the subset of U.S. federal health policy that deals with immunization against infectious disease. It is decided at various levels of the government, including the individual states. This policy has been developed over the approximately two centuries since the invention of vaccination with the purpose of eradicating disease from the U.S. population, or creating a herd immunity. Policies intended to encourage vaccination impact numerous areas of law, including regulation of vaccine safety, funding of vaccination programs, vaccine mandates, adverse event reporting requirements, and compensation for injuries asserted to be associated with vaccination.
The Stop Mandatory Vaccination website and associated Facebook group are some of the major hubs of the American anti-vaccination movement. It was established by anti-vaccination activist Larry Cook in 2015.
Misinformation related to immunization and the use of vaccines circulates in mass media and social media in spite of the fact that there is no serious hesitancy or debate within mainstream medical and scientific circles about the benefits of vaccination. Unsubstantiated safety concerns related to vaccines are often presented on the internet as being scientific information. A large proportion of internet sources on the topic are mostly inaccurate which can lead people searching for information to form misconceptions relating to vaccines.
