A British study suggests that 1 in 100 adults has some form of autism.
The world's first ever study into the prevalence of autistic spectrum disorders among adults found it's just as common in adults as children, the U.K.'s Press Association reported.
The report, from the Britain's National Health Services Information Center, looks at autistic spectrum disorders, which include autism and Asperger's syndrome.
People with autism suffer from different problems, including trouble interacting with other people and communicating their feelings.
The study also found that rates of autism are not on the rise and failed to connect autism to the mumps, measles and rubella vaccine.
Researchers said if there was a link to the vaccine, people in their early 20s or younger would have higher rates of the disorder since they were the ones who received the shot a youngsters.
The study is part of the Adult Psychiatric Morbidity Survey 2007 and was funded by Britain's Department of Health.