Is There an Autism Epidemic?

According to some advocates, an epidemic of autism is attacking young children and the government has been woefully negligent in dealing with it. But many epidemiologists dismiss the evidence used to support the idea of an epidemic. The debate has grown so ugly that researchers say they are being threatened if they question evidence of an upsurge in autism.

At a recent meeting held by the National Academies' Institute of Medicine, Laura Bono, a board member of the National Autism