Fact 1: Immunodeficiency occurs when the immune system is not working properly.

Fact 2: Many cancers can cause immunodeficiency.

Given the two facts above, answer the question "What can happen with the immune system when the body has cancer?" with the following options: 
- a lot of human deaths
 - It won't work properly
 - major threat to health
 - It will work efficiently
 - hospitalization
 - It will grow
 - direct damage to the lungs
 - It won't do anything


 

  It won't work properly       