A large Danish study finds no increased risk of autism, ADHD, or other chronic neurological, autoimmune, or allergic conditions from aluminum in vaccines. Researchers analyzed health records of more than 1.2 million children born between 1997 and 2018, following them for up to eight years and examining fifty conditions. The findings provide solid reassurance to Thai families amid ongoing concerns about vaccines.
Aluminum salts act as adjuvants, helping vaccines provoke a stronger immune response. This practice has been in use for more than nine decades. While rumours circulate online, global science has not supported a causal link between aluminum exposure in vaccines and neurodevelopmental or immune-related disorders.
The Danish study, published in a leading medical journal, stands as one of the most comprehensive examinations to date. Researchers compared different vaccine schedules and aluminum dosages within the population, effectively creating a natural experiment. They found that the hazard ratio for neurodevelopmental disorders, including autism and ADHD, hovered around 1.0, indicating no increased risk. Autoimmune and allergic conditions showed similar results, with no harmful association to aluminum exposure.
Thailand’s vaccination program mirrors international guidance, reinforcing confidence in immunisation campaigns that aim to protect children and communities. The new findings support efforts to raise vaccination coverage and counter misinformation that can deter families from vaccinating their children.
The study leveraged Denmark’s detailed health registries for robust analysis. Researchers acknowledged limitations, such as the absence of manual review of individual records and the possibility that extremely rare outcomes or very late-onset effects could escape detection.
Thai health authorities emphasise vaccine safety, noting that benefits far exceed potential risks. Vaccines prevent diseases that can cause serious illness, long-term disability, or death. Families are encouraged to rely on information from trusted medical professionals and official health agencies rather than social media rumours.
Experts highlight that early animal studies showing possible neurotoxicity from very high aluminum doses do not reflect human vaccination, where exposure is far lower and carefully regulated. In Thailand, institutions like the National Vaccine Institute and leading pediatric specialists continue to educate the public about vaccine science and promote informed decision-making.
Going forward, researchers will monitor long-term and ultra-rare outcomes to further verify safety. For now, the consensus remains: aluminum-containing vaccines are safe, and maintaining vaccination schedules is essential for personal and public health.
For Thai families evaluating vaccine decisions, the message is clear: follow official immunisation guidance, consult healthcare providers for personalised advice, and engage in constructive dialogue to protect children and the community from preventable diseases.