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Autism is a disorder of human development characterized by abnormal social interaction and communication, with restricted and repetitive behavior. 
Autism appears to be associated with differences in brain development, observable by the nature of neural networks and how their interconnections 
The autism spectrum disorders are clinically defined and cover a variety of state and potential causes. They are explained by distinguishing a complex and poorly understood environmental influences genetic component, but the search continues 
April 2 is the "World Day for Autism Awareness." 
In France, autism is recognized like an handicap in 1996.