How did Kassidi Kurill die? The day after receiving the vaccination, Kurill experienced a headache and nausea and could not urinate properly despite sufficient fluid intake. On February 4, she started to run a fever when she went to the emergency room at a hospital in Ogden. A blood test diagnosed her in urgent need of a liver transplant. At that time she revealed that her heart was racing and she also started throwing up. Soon she was airlifted to Intermountain Medical Center in Murray for the transplant, but she could not be stabilized for the procedure. She breathed her last on February 5 at the hospital. “She was healthy, happy, active until she took the shot, she went shopping with her mom, that afternoon when she took the shot,” said her stepfather Hawley, adding, “I believe that she was one of those bad reactions.”