Seven-year-old Aishwarya Aswath and her parents arrived at the Perth Children’s Hospital emergency department in the early evening of Easter Saturday. Aishwarya had been lethargic and had a fever and diarrhoea for 24 hours. She had never been particularly ill before. So the family could not have known that she had developed an infection in her blood and needed urgent attention. But they knew that the hospital would be the best place to get help.