AAP
It would be wrong to infer that children with less severe symptoms do not have autism, says Professor Andrew Whitehouse from the Telethon Kids Institute.
The so-called 'autism epidemic' is due to an increase in the diagnosis of children with less severe behavioural symptoms, not because there are more children being born with the disorder, a new Australian study shows.
There has been a 20-fold increase over the past 30 years in the prevalence of autism, which is now thought to affect at least one per cent of the Australian population.