Define biological agents in easy words also what do you mean by that symbol in English what does it show

Dear Student

Biological agents are also called bio-agents, biological threat agents, biological warfare agents, biological weapons.

It is a bacteria, virus, protozoan, parasite or fungus that can be used as a weapon in biological warfare.

(;) is a semi colon. It is a punctuation mark. 
It indicates a pause, typically between two main clauses.

Regards
 

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