Question

what are pathogens?
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Answer 1

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A pathogen or infectious agent is a biological agent that causes disease or illness to its host. The term is most often used for agents that disrupt the normal physiology of a multicellular animal or plant. However, pathogens can infect unicellular organisms from all of the biological kingdoms.

Answer 2

Answer:

A pathogen is defined as an organism causing disease to its host, with the severity of the disease symptoms referred to as Virulence.