The World Health Organization (WHO) emphasizes that there is no conclusive scientific evidence linking the use of acetaminophen (paracetamol) during pregnancy with autism. Researchers worldwide have conducted numerous large-scale studies over the past decade to investigate a potential connection, but these studies have found no consistent association.
Women should follow the guidance of their doctors or health workers when using medicines during pregnancy. They should take all medicines, including acetaminophen, with caution—especially in the first trimester—and only as recommended by qualified health professionals.
Understanding Autism: A Global Perspective
Autism spectrum disorder (ASD) affects nearly 62 million people globally, or about 1 in 127 individuals. ASD represents a diverse group of conditions related to brain development. While awareness and diagnosis have improved, the exact causes remain unclear. Scientists agree that multiple genetic, biological, and environmental factors likely play a role in autism’s development.
Vaccines Do Not Cause Autism
As per WHO Press release, WHO underscores that a robust, extensive body of research confirms that childhood vaccines do not cause autism. High-quality studies from multiple countries have consistently reached the same conclusion. Early studies suggesting a link were flawed and have been discredited.
Independent experts advising WHO since 1999 have repeatedly confirmed that vaccines—including those containing thiomersal or aluminum—are safe and do not cause autism or other developmental disorders.
Lifesaving Role of Childhood Immunization
Global experts and country-level authorities develop childhood immunization schedules through a rigorous, evidence-based process. These schedules have saved at least 154 million lives over the past 50 years and now protect children, adolescents, and adults from 30 infectious diseases.
WHO’s Strategic Advisory Group of Experts on Immunization (SAGE) reviews all evidence before making recommendations. This process ensures that vaccines are administered at the right time to offer maximum protection.
When vaccination schedules are delayed or disrupted without scientific basis, the risk of infectious disease outbreaks rises sharply. This risk threatens not only unvaccinated children but also infants too young for vaccines and individuals with weakened immune systems.
Global Focus on Autism and Neurodevelopmental Disorders
Autism and other neurodevelopmental disorders are a major focus at the 4th UN High-Level Meeting on NCDs and Mental Health taking place on Thursday, 25 September. Global leaders will discuss strategies to better understand autism, improve care models, and support autistic individuals and their families.
WHO’s Commitment to Inclusion and Evidence-Based Action
WHO remains committed to advancing autism research and supporting autistic people worldwide. By working with partners—including autistic-led organizations and those representing individuals with lived experience—WHO aims to ensure that autism is approached with dignity, free from stigma, and guided by the best available scientific evidence.