It is false that vaccines directly trigger autism, however the debate can be further developed.
The most common argument for vaccines causing autism is a little misinformed, the "autism" in these cases of children receiving unwarranted symptoms is officially classified as "vaccine encephalopathy" which has been proven to be a myth (Berkovic et al. 2006). It was found that in majority of the cases that were classified as being vaccine encephalopathy, the mutation of the SCN1A gene was observed and this mutation acts as a tripper for the onset encephalopathy (Berkvovic et al. 2006).
Most people stop here, they see that the vaccine caused onset mutation and now the child has autism. First, encephalopathy is not autism, its a disorder that causes brain malfunction, and majority of its cases are genetic (some caused by other types of extreme trauma) (MedLinePlus). Secondly, in the cases where vaccine encephalopathy were studied, it was found that this genetic disorder was caused de-novo (post fertilization) (Doja 2005). Meaning the child already had the genetic disorder from birth and would have it later develop in life. So there is some truth in the vaccine triggering the encephalopathy early, but its not the exact cause.
The research in this topic is still heavily underway and is usually limited due to number of cases and ability to check other genomes. The medical field is a very large and very confusing area in science and is always being scrutinized. It is easy to be misguided due to a few slightly incorrect studies. One thing this topic may also overlook is how autism is largely genetic. Even if one chemical or medicine truly causes Autism, we will not see it until multiple generations after implementing the vaccine.
Berkovic, Samuel F., et al. “De-Novo Mutations of the Sodium Channel Gene SCN1A in Alleged Vaccine Encephalopathy: A Retrospective Study.” The Lancet Neurology, vol. 5, no. 6, June 2006, pp. 488–92. www.thelancet.com, https://doi.org/10.1016/S1474-4422(06)70446-X.
Doja, Asif. “Genetics and the Myth of Vaccine Encephalopathy.”
Paediatrics & Child Health, vol. 13, no. 7, Sept. 2008, pp. 597–99.
Silverchair,
https://doi.org/10.1093/pch/13.7.597.
Ethylmalonic Encephalopathy: MedlinePlus Genetics.
https://medlineplus.gov/genetics/condition/ethylmalonic-encephalopathy/. Accessed 6 Feb. 2025.