Staff Reporter

The World Health Organization (WHO) has issued a definitive statement reaffirming that childhood vaccines do not cause autism, citing a comprehensive new analysis of global data spanning more than two decades.

The conclusion, reached by the Global Advisory Committee on Vaccine Safety (GACVS) during a late November summit, aims to dismantle long-standing misinformation regarding vaccine ingredients and developmental disorders.

“The available high-quality evidence shows no association between the trace amounts of aluminum used in some vaccines and ASD [Autism Spectrum Disorder],” the committee stated, confirming the safety of thiomersal, a mercury-based preservative that has been a focal point of public concern for years.

The GACVS, an independent body of international experts established in 1999, conducted a multi-layered review of primary research published between 2010 and August 2025.

Their findings integrated data from dozens of countries, including a massive cohort study of every child born in Denmark over a 21-year period (1997–2018).

Analysis of 31 primary research studies confirms that vaccines administered during childhood and pregnancy do not trigger ASD.