9/9. Forty years ago autism was thought to affect less than one person in 1,000. Today that figure is closer to one in 100 -that's half a million people across the UK. Now that links with the MMR vaccine have largely been dismissed, is it simply a matter of better awareness and more inclusive diagnostic criteria or is there something else going on? Dr Mark Porter finds out the latest on the condition and its treatment.
Producer Helen Sharp Repeated tomorrow at 4.30pm