Autism does not have cause vaccine
Autism, formally called autism spectrum disorder (ASD) and autism spectrum condition (ASC), is a neurodevelopmental disorder characterized by deficits in social communication and social interaction, and repetitive or restricted patterns of behaviors, interests, or activities, which can include hyper- and hyporeactivity to sensory input. Autism is a spectrum disorder, meaning that it can manifest very differently in each person. For example, some are nonspeaking, while others have proficient spoken language. Because of this, there is wide variation in the support needs of people across the autism spectrum.
Psychiatry has traditionally classified autism as a mental disorder, while the autism rights movement and a small but increasing number of researchers see autism as part of neurodiversity, the natural diversity in human thinking and experience, with strengths, differences, and weaknesses. From this point of view, autistic people often still have a disability, but need to be accommodated, rather than cured. This perspective has led to significant controversy among those who are autistic alongside advocates, practitioners, and charities.There are many theories about what causes autism; it is highly heritable and believed to be mainly genetic, but many genes are involved, and environmental factors may also be relevant. The syndrome frequently co-occurs with other conditions, including attention deficit hyperactivity disorder, epilepsy, and intellectual disability. Disagreements continue about questions such as what should be included as part of the diagnosis, whether there are meaningful subtypes of autism, and the significance of autism-associated traits in the wider population. The combination of broader criteria and increased awareness has led to a trend of steadily increasing estimates of autism prevalence, causing a misconception that there is an autism epidemic and perpetuating the myth that it is caused by vaccines.There is no known method to prevent or cure autism. Many forms of therapy, such as speech and occupational therapy, have been developed that may help autistic people. Some forms of therapy, such as applied behavior analysis, are controversial in the autism rights movement, with many advocates considering them unhelpful and unethical. Intervention can require accommodations such as alternative modes of communication. The use of medicine is usually focused on associated conditions such as epilepsy or treating certain symptoms.Disproven vaccine hypothesis
Parents may first become aware of ASD symptoms in their child around the time of a routine vaccination. This has led to unsupported and disproven theories blaming vaccine "overload", a vaccine preservative, or the MMR vaccine for causing autism spectrum disorder. In 1998, British physician and academic Andrew Wakefield led a fraudulent, litigation-funded study that suggested that the MMR vaccine may cause autism. This conjecture suggested that autism results from brain damage caused either by the MMR vaccine itself, or by thimerosal, a vaccine preservative. No convincing scientific evidence supports these claims. They are biologically implausible, and further evidence continues to refute them, including the observation that the rate of autism continues to climb despite elimination of thimerosal from routine childhood vaccines. A 2014 meta-analysis examined ten major studies on autism and vaccines involving 1.25 million children worldwide; it concluded that neither the MMR vaccine, which has never contained thimerosal, nor the vaccine components thimerosal or mercury, lead to the development of ASDs. Despite this, misplaced parental concern has led to lower rates of childhood immunizations, outbreaks of previously controlled childhood diseases in some countries, and the preventable deaths of several children.
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