One Gazan woman who fled to Cairo has no idea who will pay her medical bills when she gives birth in the coming days. Another man spent three days below the rubble of a building before he made it to the city that is home to 23 million people. More than 100,000 Palestinians fled to Egypt to escape the fighting in Gaza. Many have suffered severe injuries. Their residence status is unclear, they are stuck in a legal grey zone, without work or money, tolerated, often invisible. Most have to find a way to manage on their own, or rely on support from other Palestinians or volunteer organizations. In…