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

Fact 2: Dangerous microbes are called pathogenic or disease causing.

Given the two facts above, answer the question "Pathogens have what impact on the body?" with the following options: 
- Roundworms
 - small
 - viruses
 - insignificant
 - Roundworms.
 - toxins
 - positive
 - negative


 

        negative 