About autism spectrum disorder (ASD)

Learn about autism spectrum disorder (ASD).

What is ASD?

ASD is a condition that becomes noticeable in childhood, usually before a child turns 2 years old. It is a social and communication disorder. Differences in the nervous system and brain make a person act or communicate differently than others.

A person with ASD may find it hard to connect with other people. They may:

  • have difficulty communicating
  • have difficulty with social situations
  • repeat certain patterns of behaviour
  • show interest in a limited number of activities and interests

These behaviours can happen in different settings (school, home, work) and continue from childhood into adulthood. Having ASD can greatly affect everyday activities.

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