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 has a negative impact on the body?" with the following options: 
- pathogens
 - medicines
 - antibiotics
 - smallpox
 - amoebae
 - viruses
 - smoking
 - antibodies


 

 pathogens        