evidence: Moreover, aluminum has been used in vaccines for decades and there is no evidence that it causes autism. The aluminum adjuvant used in some vaccines helps to stimulate the immune system and improve the effectiveness of the vaccine. [...] Aluminum and the Vaccine-Autism Controversy [...] In conclusion, there is currently no strong evidence to support the claim that aluminum causes autism. While aluminum exposure can occur through various sources, including vaccines, the amount of aluminum in vaccines is considered safe and necessary to improve vaccine efficacy.