The World Health Organization has reaffirmed that there is no conclusive scientific evidence linking the use of acetaminophen (paracetamol) during pregnancy, or childhood vaccines, to autism spectrum disorder.
The statement comes in response to recent claims and public debates suggesting possible connections.
The WHO emphasized that while extensive research has been carried out over the past decade—including large-scale studies on the use of acetaminophen during pregnancy—“no consistent association has been established.”
The organisation urged pregnant women to continue seeking medical advice from doctors or health workers before using any medication.
The statement also reiterated that “a robust, extensive evidence base exists showing childhood vaccines do not cause autism.” The WHO highlighted that the original studies suggesting a link were “flawed and have been discredited.”
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The organization’s Strategic Advisory Group of Experts on Immunization develops vaccination schedules through rigorous evidence reviews.
These schedules, adopted by all countries, have saved at least 154 million lives over the past 50 years.
The WHO cautioned that disrupting immunization programs without evidence could trigger “a sharp increase in the risk of infection not only for the child, but also for the wider community.”
The statement coincides with the 4th UN High-Level Meeting on Non-Communicable Diseases and mental health, where autism and other neurodevelopmental disorders are under discussion.
The WHO reaffirmed its commitment to advancing research to better understand the causes of autism and to support autistic people and their families.
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