Autism’s Causes: How Close Are We to Solving the Puzzle?

PBS NewsHour:

ROBERT MACNEIL: As we’ve reported, autism now affects one American child in a 110. Last month, a committee convened by public health officials in Washington called it a national health emergency. The dramatic rise in official figures over the last decade has generated a surge of scientific research to find what is causing autism.
Among the centers for such research is here, the University of California, Davis MIND Institute in Sacramento. Here and around the country, we’ve talked to leading researchers about where that effort now stands. Among them is the director of research at the MIND Institute, Dr. David Amaral.
DR. DAVID AMARAL, MIND Institute: Well, I think we’re close to finding several causes for autism. But there’s — I don’t think there’s going to be a single cause.
ROBERT MACNEIL: The science director of the Simons Foundation in New York, Dr. Gerald Fishbach; Dr. Martha Herbert, professor of neurology at Harvard Medical School; and Dr. Craig Newschaffer, professor of epidemiology and biostatistics at Drexel University in Philadelphia. First, I asked, how close are we to discovering the cause of autism?