A Colorado father is sharing his family’s story after his 5-year-old son died during a summer vacation. According to the report, Viet Vu of Denver said his son, Justin, became sick suddenly while the family was away, and the illness was later linked to a rare disease.

The case has drawn attention because of how quickly the child’s condition changed. Vu is now speaking publicly to warn other parents that a serious medical problem can emerge without much warning, even during what appears to be a normal family trip.

The report centers on the shock of losing a young child to an uncommon disease that many families may know little about. By telling Justin’s story, Vu is helping highlight the risks of rare illnesses in children and the difficulty of recognizing them early.

Justin’s death has turned a family vacation into a message about awareness, urgency and the need to take sudden symptoms seriously. While the full medical details were not outlined in the excerpt, the father’s warning underscores how fast a rare disease can become life-threatening.