Despite strong evidence of its safety, some parents are still hesitant to accept MMR vaccination of their children. Decreasing acceptance of MMR vaccination has led to outbreaks or resurgence of measles. Health-care providers have a vital role in maintaining confidence in vaccination and preventing suffering, disability, and death from measles and other vaccine-preventable diseases. Keywords: ASD; MMR vaccine; autism; autism spectrum disorder; immunization; measles, mumps, and rubella vaccine; vaccination; vaccine safety.
Two studies have been cited by those claiming that the MMR vaccine causes autism. Both studies are critically flawed. The relationship between adverse reactions to vaccine and autism spectrum disorder has received little attention in research as of this writing. At the public health level, a better understanding of the relationship between perceived adverse reactions to vaccine and autism spectrum disorder is necessary in order to more effectively address concerns about vaccination.
NICHD's portfolio covers a variety of topics in autism, including autism etiology, epidemiology, treatment, and screening. The institute also supports professional training and the development of research infrastructure that will facilitate research in ASD and other intellectual and developmental disabilities.
The most common claims are that autism is caused by measles-mumps-rubella MMR vaccine, vaccines that contain thimerosal, or too many vaccines. Many studies have been done to test these claims. None has shown that vaccines cause autism.
This sheet lays out the facts to help parents understand why experts do not think vaccines cause autism. Autoimmune disease. Adult immunization. Counselling the public. Cost effectiveness. Vaccine coverage. Hepatitis A. Hepatitis B. Haemophilus influenzae type B Hib. However, no evidence of an association between increased exposure to vaccines and autism has appeared. Yet the amounts of aluminum used in vaccines are small in comparison to other exposures to aluminum, such as in breast milk and infant formula.
Aluminum in vaccines has not been implicated in any infant or childhood health problems. Most scientific and medical experts are satisfied that no connection exists between vaccines and autism and other neurodevelopmental disorders. Still, critics continue to question the issue. Not only do they question the relationship between MMR and thimerosal and autism, they bring up further culprits they believe might play a role in development of autism.
Researchers continue to examine these questions, but there is no evidence that these factors play a role in autism development. Most autism researchers hold that the causes of autism are many and include genetic and environmental factors, but do not involve vaccines. British researcher Andrew Wakefield, along with 12 co-authors, published a paper in the Lancet claiming evidence of measles virus in the digestive systems of autistic children.
In press conferences after the paper was published, Wakefield suggested a relationship between the MMR measles, mumps and rubella vaccine and autism. Wakefield then recommended that the combination MMR vaccine be suspended in favor of single-disease vaccinations given separately over time. Measles cases, meanwhile, began to rise: while only 56 cases were confirmed in Wales and England in , 1, were confirmed by Numerous epidemiological studies performed since have also provided additional evidence that no such link exists.
Subsequently, the Lancet formally retracted the paper; in May , Wakefield was banned from practicing medicine in Britain. Despite this and the lack of any evidence to support a link between vaccines and autism, some groups remain convinced of the allegations first raised by Wakefield in Article Menu [ ]. Vaccine Science [ ].
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