Question

communicable diseases are caused in humans by ​

Answer 1

Pathogens is your answer !!!
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Answer 2

Answer:

Communicable, or infectious diseases, are caused by microorganisms such as bacteria, viruses, parasites and fungi that can be spread, directly or indirectly, from one person to another. Some are transmitted through bites from insects while others are caused by ingesting contaminated food or water.

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