Fact 1: HIV infects and destroys helper T cells.

Fact 2: Helper T cells are the critical link in our immune system.

Given the two facts above, answer the question "What does HIV damage?" with the following options: 
- Leptospirosis
 - immunities
 - Our immune system
 - immunizations
 - Veins and arteries.
 - respiratory system
 - Plant reproduction
 - the body's largest organ


 

   Our immune system      