In this docuseries, meet the heroes on the front lines of the battle against influenza and learn about their efforts to stop the next global outbreak.

1. It Hunts Us 53m In this introduction to life on the front lines, doctors in the U.S. and Asia battle the flu, and researchers race to develop a universal vaccine.

2. Pandemic Is Now 51m Vaccine debates rage while health-care workers inoculate against the Ebola virus in Congo and influenza in detainee camps at the U.S.-Mexico border.

3. Seek, Don't Hide 51m Worldwide, scientists test animals and their handlers for emerging viruses. In the U.S. and India, doctors work long hours caring for flu patients.

4. Hold On to Your Roots 49m Anti-vaccine debate escalates, and medical staff are attacked in Congo. Funding cuts hit hard in the U.S., but researchers in Guatemala make strides.

5. Prayers Might Work 42m Around the world, community, family and faith help physicians and medical advocates stay strong in the face of long hours and a relentless disease.