Skip directly to search Skip directly to A to Z list Skip directly to navigation Skip directly to page options Skip directly to site content

About Us

Photo of mother playing with childRecognizing the Early Signs of ASD

We naturally think of a child's growth as height and weight, but from birth to 5 years, a child should reach milestones in how he or she plays, learns, speaks and acts. A delay in any of these areas could be a sign of ASD or other developmental disability.

Through the “Learn the Signs. Act Early.” program, CDC and its partners aim to improve early identification of children with ASD and other developmental disabilities so children and families can get the services and support they need.

Understanding Risk Factors and Causes of ASD

Understanding the risk factors that make a person more likely to develop autism spectrum disorder (ASD) will help us learn more about the causes. CDC is currently funding and working on one of the largest U.S. studies to date, called Study to Explore Early Development (SEED).

SEED will help identify factors that may put children at risk for ASD and other developmental disabilities. SEED is a multi-year study being conducted at six sites and a data coordinating center, called the Centers for Autism and Developmental Disabilities Research and Epidemiology (CADDRE) network.

Determining How Many People Have ASD

Photo: girl sitting a stack of books playing on a computerThere continue to be many children living with ASD who need services and support, both now and as they grow into adolescence and adulthood.

By studying the number of people identified with ASD over time, we can find out if the number is rising, dropping, or staying the same. We can also compare the number of children with ASD in different areas of the country and different groups of people. This information can help us look for causes of ASD.

To learn more about this work, please visit our Research Page »

Vaccine Studies

There have been many studies that have looked at whether there is a relationship between vaccines and ASD. To date, the studies continue to show that vaccines are not associated with ASD.

CDC has funded and participated in several studies related to ASD and vaccines. To learn more about these studies, please visit our Research Page.


E-mail Your Friends

"Children with autism spectrum disorder are not being diagnosed as early as they could be. Learn the signs of autism and get help if you’re concerned."

Send an E-mail

Share on Facebook

A young girl playing with blocks.

"Many children with autism spectrum disorder (ASD) are not being identified as early as they could be. Early identification is the most powerful tool we have right now to make a difference in the lives of children with ASD."

Share on Facebook

Share on Twitter

"Too many children w/ autism are not being identified as early as they could be. Earlier is better. #ActEarly"

Share on Twitter