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Autism spectrum disorder (ASD) is diagnosed through observed and reported behavior; no biological or genetic markers currently allow for a definitive diagnosis. Clinicians base assessments on standardized behavioral criteria defined in the International Classification of Diseases (ICD) of the World Health Organization and the Diagnostic and Statistical Manual of Mental Disorders (DSM) of the American Psychiatric Association.
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Search interest data over the past 12 months indicates that this topic periodically attracts global attention. Sudden spikes often correlate with major news events, public statements, or geopolitical developments.