"In Syria, they have a million people injured as a direct result of the war. You can see it in the country when you travel around. You see a lot of amputees," said Hoff. "This is the biggest problem." She said a collapsed health system, where over half of public hospitals are out of service, has meant that treatments for diseases and injuries are irregular.
Hoff said that Assad's government -- which demands to sign off on aid convoys -- is still blocking surgical supplies, such as bandages and syringes, from entering rebel-held areas.