Aluminum
A metallic element that is found combined with other elements in the earth’s crust. It is also found in small amounts in soil, water, and many foods. It is used in medicine and dentistry and in many products such as foil, cans, pots and pans, airplanes, siding, and roofs. High levels of aluminum in the body can be harmful.
NCI Dictionary of Cancer Terms
U.S. National Cancer Institute, 2021
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Aluminum-Adsorbed Vaccines and Chronic Diseases in Childhood: A Nationwide Cohort Study
Key issues include uncertain real exposure, limited follow-up, absence of an unexposed comparison group, no stratification by known risk factors, and structural biases that prevent detection of moderate, delayed, or subgroup-specific harms.