15 July 2025

Study reveals no connection between vaccine aluminum and autism or asthma development.

Vaccine skeptics often express concerns about aluminum in childhood vaccines, linking it to various health issues. However, a recent study involving over 1 million individuals, published in the Annals of Internal Medicine, discovered no association between aluminum exposure from vaccines and an increase in 50 chronic conditions, including autoimmune diseases, allergies, and autism. Health and Human Services Secretary Robert F. Kennedy Jr. has been a prominent spreader of vaccine misinformation, claiming on a podcast that aluminum in vaccines is “extremely neurotoxic.”

His assertions persist despite the lack of credible evidence supporting such claims. Senior study author Anders Hviid understands parental concerns regarding vaccine safety. He emphasized that the study provides robust evidence for the safety of childhood vaccines, which parents need to make informed decisions.

Hviid and his team analyzed data from Denmark’s nationwide registry, examining 1.2 million births from 1997 to 2018 and tracking health outcomes until 2020. They specifically looked at the potential risks associated with aluminum exposure from vaccines. The study identified no connections between aluminum and the chronic conditions under investigation.

Experts recognize the quality of Scandinavian public health research. Ross Kedl noted that the centralized health system in this region allows for comprehensive tracking of health trends over time. The impetus for the study stemmed from a previous controversial study funded by the CDC that suggested a link between aluminum-containing vaccines and asthma risk without adequately distinguishing sources of aluminum.

Aluminum serves a critical role in vaccines as an adjuvant, helping to stimulate the immune response. Hviid explained that the aluminum present in vaccines is in the form of small aluminum salts, not harmful metallic aluminum. These salts are typically cleared from the body quickly.

The study’s outcomes emphasize the importance of separating political discourse from scientific evidence, as the consequences of misinformation can deeply impact children’s health.