Two months ago, Aisha al-Loulou, a 5-year-old girl from Bureij refugee camp in the Gaza Strip, fell ill. She complained of severe headaches and was unable to keep down almost anything she ate. Her parents took her to the camp’s clinic, run by UNRWA, the United Nations’ refugee agency. The diagnosis there was that she had a problem in her abdomen; they gave her pain-killing medication but the pain and the vomiting continued. A few days later her parents took her back to the clinic. The doctors now said she was suffering from an infection of the jaw. Skeptical, her parents took her to a private doctor. He diagnosed a gastrointestinal ailment. The next diagnosis, at Shuhada al-Aqsa Hospital in Dir al-Balah, was that Aisha had a urinary infection. She received intravenous treatment, additional medications were prescribed, and she was sent home. But the little girl continued to suffer; she threw up all night long.