Fact 1: Disease has a negative impact on an organism.

Fact 2: Illness is a subjective experience of disease.

Given the two facts above, answer the question "What has a negative impact on an organism?" with the following options: 
- Good food.
 - Illness.
 - influenza
 - leukemia
 - Impactful Speech
 - liver cancer
 - smallpox
 - Organization


 

  Illness.       