Autism

People who have an autism spectrum disorder (ASD) have problems communicating and interacting with others. Autism symptoms often appear early, typically before age 3. Autism symptoms can include language delays; lack of eye contact; and repetitive or obsessive behavior, such as rocking or hand flapping.

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Stimming: What This Behavior Is and Why People Do It

You've seen people stimming—you might even stim yourself without realizing it. Here's everything you need to know, including why it's controversial.

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Do Vaccines Really Cause Autism?

What's the real story? Health asked leading autism researchers to help us figure it out.