Fact 1: Disease-causing microbes have a negative impact on the body.

Fact 2: Pathogens are microbes that cause disease.

Given the two facts above, answer the question "What can have a negative impact on the body?" with the following options: 
- Pesticides
 - Growing a beard
 - Pathogens
 - Probiotics
 - Restful sleep
 - viruses
 - smallpox
 - bacteria


 

   Pathogens      