sudden death caused by immunoincompetence diseases

例句：

1. 1. The sudden death of the CEO was a shock to everyone.
   首席执行官的突然去世让每个人都感到震惊。
2. 2. The sudden death of the child is still under investigation.
   这个孩子的突然死亡仍在调查中。
3. 3. The sudden death of the elderly person has raised concerns about their health.
   这位老人的突然去世引发了人们对其健康状况的关注。