Vaccines: Calling the Shots - Alison Singer

Vaccines don't cause autism. That's the message from Alison Singer, President of the Autism Science Foundation. She explains that vaccines are "a victim of their own success," because they've proven so effective to prevent many illnesses and diseases that people used to fear like measles, polio and whooping cough. And because of a lively anti-vaccination movement in the United States, many of these diseases that were once nearly extinct in the country are back. Singer, and other specialists are featured in NOVA's documentary, Vaccines: Calling the Shots, to explain the science behind and the importance of vaccines.