Today, about 50 million Americans, or one in five people, are living with at least one disability, and most Americans will experience a disability at some time during the course of their lives. Some disabilities are easy to see, such as when a person uses a wheelchair or when someone has lost an arm. Other disabilities, like a developmental disability such as autism or a chronic condition like arthritis, may not be as easy to see. Some people may live with a disability all their lives. Others may have a disability when they are young or as an older adult. Different kinds of disabilities affect people in different ways. And the same disability can affect each person differently. Developmental Disabilities>>