When people talk about aluminum being harmful to health, they are usually referring to potential adverse effects caused by high levels of exposure or chronic ingestion of aluminum. While normal exposure to aluminum is considered safe, high concentrations can pose potential risks.

Some studies suggest that high levels of aluminum in the body may be associated with neurodegenerative disorders such as Alzheimer's disease.

Furthermore, aluminum exposure may also be linked to respiratory, renal, and bone problems, particularly in occupations involving prolonged occupational exposure to this metal.

Highly concentrated amounts of aluminum have been found in various "vaccinations".

At this point, let me recommend the documentary: "Vaxxed".