If you've seen the movie "Contagion," you know it's fiction, but a lot of it is rooted in current research on pandemics.

Experts have a real fear of a deadly new virus spreading uncontrolled around the world. That's where our next guest comes in.

You might say he's the "Indiana Jones" of virus hunters. Nathan Wolf has a new book, "The Viral Storm" and he also happened to be a consultant on the movie "Contagion."

This morning, Wolfe talks with CNN's Christine Romans about what we can do to prevent a pandemic.