Our lives are going digital. We shop, bank and even date online. Computers hold our treasured photographs, private emails, and all of our personal information. This data is precious -- and cybercriminals want it. Now, NOVA goes behind the scenes of the fast-paced world of cryptography to meet the scientists battling to keep our data safe.
Diseases that were largely eradicated in the United States a generation ago — whooping cough, measles, mumps — are returning, in part because nervous parents are skipping their children's shots. "Vaccines – Calling the Shots" takes viewers around the world to track epidemics, explore the science behind vaccinations and shed light on the risks of opting out. The program features scientists, pediatricians, psychologists, anthropologists and parents wrestling with vaccine-related questions.