Dr Leo Kanner (1894 -1981), of Johns Hopkins Hospital, Maryland, in the United States, was the first to use the term ‘autism’ as a diagnosis in 1943, after studying 11 children diagnosed with early infantile autism. Autism spectrum disorder (ASD) is a developmental disability caused by brain differences. ASD makes people frequently struggle with social communication and interaction, as well as restricted or repetitive behaviours or interests. People with ASD may also learn, move, or pay attention in different ways. It is important to note that some people who do not have ASD may exhibit some of these symptoms. However, for people with ASD, these characteristics can make life extremely difficult.