Overview: '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.

DVD Verdict: 'NOVA: Vaccines - Calling the Shots' goes a long way to making us aware that the vast majority of Americans - more than 90% - vaccinate their children. Yet many people have questions about the safety of vaccines, and in some communities, vaccination rates have fallen below the level needed to maintain herd immunity allowing outbreaks to take hold and spread.

'NOVA: Vaccines - Calling the Shots' draws on the latest, best available evidence to help parents find the answers. Highlighting real cases and placing them in historical context, the documentary traces outbreaks of communicable diseases and demonstrates just how fast they can spread and how many people can fall sick when a community's immunity barrier falls.

Explore the science behind vaccinations and the risks of opting out in 'NOVA: Vaccines - Calling the Shots,' one of the documentaries that, whether you have children or not, you just have to watch. This is a Widescreen Presentation (1.85:1) enhanced for 16x9 TVs.