The World Health Organization (WHO) on Wednesday firmly rejected the recent claims made by the US Centers for Disease Control and Prevention (CDC), reiterating that there is no scientific link between vaccines and autism.

The clarification followed a shift in the CDC’s long-standing position last month, when it stated under the Trump administration that the consensus denying a vaccine–autism connection is not “evidence-based,” and argued that studies supporting a link have been overlooked.

In response, the WHO said its Global Advisory Committee on Vaccine Safety (GACVS) conducted a detailed analysis of 31 primary studies published between January 2010 and August 2025. The review examined both thiomersal-containing vaccines and all childhood vaccines in relation to autism spectrum disorde

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