In the United States, one in 36 children and one in 45 adults have autism, with males four times more likely to be affected.

About 9 percent of American children have attention-deficit/hyperactivity disorder (ADHD), and one-third of those will continue to have it in adulthood.

In the United States, cerebral palsy affects one in 323 children. Globally, up to four out of every 1,000 babies are born with the condition.