Thank you for your comment. However, I covered most of your concerns (hopefully) in the article.

First, thimerosal contains ethylmercury that human tissues eliminate quickly, which can’t accumulate in the body like methylmercury found in fish and shellfish. Despite that, thimerosal was removed from vaccines as a means to calm public fears.

Second, although studies found elevated aluminum levels in the brain of children with autism, they didn’t pinpoint the source of aluminum and simply assumed it was the vaccine. In fact, aluminum exposure from dietary sources (such as breast milk and formula) is about the same as all the vaccines an infant normally takes in the first year of life, and the total aluminum exposure is still far lesser than the toxicity limit.

Third, several formal studies have investigated vaccine safety in regards to autism. In one of the studies, scientists followed 657,461 children born from 1999 through 2013 in Denmark. This nationwide study revealed similar autism incidence between MMR-vaccinated and -unvaccinated children. This outcome was not influenced by autism-related risk factors.

I didn’t cover about Alzheimer's and aluminum since it is beyond the scope of the article. While past research did find an association between aluminium and Alzheimer’s, the association doesn’t seem to stand to this day (https://www.alz.org/alzheimers-dementia/what-is-alzheimers/myths). Rather, cadmium, lead and manganese seem to be the prime heavy metal suspects of Alzheimer’s now. But I didn’t read into this topic in-depth, so I could be wrong about this (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7454042/.)