evidence: The GACVS reviewed 2 published papers alleging that aluminium in vaccines is associated with autism spectrum disorders3, 4 and the evidence generated from quantitative risk assessment by a US FDA pharmacokinetic model of aluminium-containing vaccines. [...] The GACVS also reviewed the US FDA risk assessment model of aluminium in vaccines. The FDA calculations incorporate the most recently published aluminium risk assessments by adjusting for gastrointestinal absorption and uptake from the site of injection. The FDA analysis indicates that the body burden of aluminium following injections of aluminium-containing vaccines never exceeds safe US regulatory thresholds based on orally ingested aluminium even for low birth-weight infants. GACVS concludes that this comprehensive risk assessment further supports the clinical trial and epidemiological evidence of the safety of aluminium in vaccines. Current research on pharmacokinetics of aluminium in vaccines is ongoing and should be encouraged as a means of further validating and improving this model.