How do you keep a million refugees healthy?

Story highlights

  • The race is on to keep refugees healthy as they migrate across continents
  • Moving populations bring challenges for health teams to provide and follow-up with treatment
  • Refugees are suffering from a new range of health conditions NGOs and UN agencies are not ready for

Vital Signs is a monthly program bringing viewers health stories from around the world.

(CNN)More than a million people fled their home countries in 2015 in search of refuge, half of them escaping the war in Syria. The race is on to keep them alive -- and healthy.

These new waves of people brought new health challenges that NGOs, U.N. agencies, and refugees themselves were not ready for -- despite years of expertise.
    Public Health experts from the United Nations High Commissioner for Refugees and London School of Hygiene and Tropical Medicine told CNN about the challenges they're facing to keep people alive.

      Mobile populations