Define an infectious agent.

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Solution

Infectious agent: The agents that transfer diseases from a diseased person to a healthy person.
The infectious agents include bacteria, fungi, viruses, protozoans, and worms.
Diseases spread by viruses: AIDS, Dengue.
Diseases spread by fungi: skin diseases, eyes infection.
Diseases spread by bacteria: cholera, typhoid.
Diseases spread by protozoans: Malaria, sleeping sickness.

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