Terry Gross

Nathan Wolfe travels to the viral hot spots of the world, where viruses first jump from animals to humans. The scientist spends his days tracking emerging infectious diseases before they turn into global pandemics.

MacFarlane is best known for creating the animated TV shows Family Guy, American Dad! and The Cleveland Show. But he's also a singer whose new album features songs from the Great American Songbook.

More soldiers are returning from Iraq and Afghanistan with wounds that would have been fatal a decade ago. The injuries have led to advances in combat medicine but have challenged the health care systems meant to help veterans back home. War reporter David Wood talks with Fresh Air about the hurdles facing these troops and their families.