Fact 1: Bacteria can cause people to become ill.

Fact 2: Bacteria that cause disease are called pathogens.

Given the two facts above, answer the question "If a person does what it may be due to a pathogen?" with the following options: 
- is born
 - apoptosis
 - contracting
 - smoking
 - falls ill
 - symptoms
 - feels well
 - is happy


 

     falls ill    