CNN's Dr. Sanjay Gupta explains the limitations of the CDC's phone survey that found 1 in 50 children has autism, and talks about why a report released by the same government agency last year put that number much lower at 1 in 88.
"I think in part it depends how you count these cases," says Sanjay. "I don't think there's been that significant an increase, but this is more reflective of increased awareness, an increased diagnosis."
The older study used children's medical records as the basis for the data, and in the new study, parents were asked to answer questions over the phone. Sanjay points out the difficulty in comparing the two reports because of the different methodology used, and says in both cases no children were directly observed.
Watch the video to hear Sanjay's full report.
To find out more, read CDC: Number of children with autism higher than previously thought
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
Questions or comments? Send an email
Want to know more? Go behind the scenes with