one child has autism.
[{"role": "system", "content": "Autism is a developmental disorder characterized by troubles with social interaction and communication. Often there is also restricted and repetitive behavior. Parents usually notice signs in the first two or three years of their child's life. These signs often develop gradually, though some children with autism reach their developmental milestones at a normal pace and then worsen. Autism is caused by a combination of genetic and environmental factors. Risk factors include certain infections during pregnancy such as rubella as well as valproic acid, alcohol, or cocaine use during pregnancy. Controversies surround other proposed environmental causes; for example the vaccine hypotheses, which have been disproven. Autism affects information processing in the brain by altering how nerve cells and their synapses connect and organize; how this occurs is not well understood. In the DSM V, autism is included within the autism spectrum (ASDs), along with Asperger syndrome which is less severe, and pervasive developmental disorder, not otherwise specified (PDD-NOS). Early speech or behavioral interventions can help children with autism gain self-care, social, and communication skills. Although there is no known cure, there have been cases of children who recovered.\n"}, {"role": "assistant", "content": "Autism is such a tough thing for children. They often have trouble with social interaction and communication with others."}, {"role": "user", "content": "how any people have autism?"}, {"role": "assistant", "content": "I am not sure the exact number, but enough that there was a advocacy organization in the United States started called \"Autism Speaks\" to conduct research and awareness."}, {"role": "user", "content": "thats good to know. how long has autism been identifed as an issue ?"}, {"role": "assistant", "content": "I believe in the early 1900's and there is no known cure."}, {"role": "user", "content": "what causes it ?"}, {"role": "assistant", "content": "It is caused by a combination of genetic and environmental factors."}, {"role": "user", "content": "that makes sense"}]