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glossary

Pathogen

Image of a headshot containing pathogens on its face. The image shows pathogens making a person sick. The person has a thermometer in their mouth and a ice bag on their head. http://creativecommons.org/licenses/by-nc-sa/4.0

A microbe that causes illness. Most micro-organisms are not pathogenic to humans, but some strains or species are harmful.

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