can the cells in your immune system die

Question: can the cells in your immune system die
- Keywords:
  death,
  die,
  immune system
Asked by bill nye xoxo to Carolyn on 12 Nov 2015.
- Carolyn Nielsen answered on 12 Nov 2015:
  
  Yes! None of your cells live forever, but some types have longer lives than others. They will then be replaced, but this doesn’t happen as efficiently in older people which is one of the reasons their immune systems don’t work quite as well.

Question: can the cells in your immune system die