Question

Infectious diseases are caused by ____.

Answer 1

Infectious disease are caused by microorganisms like virus , bacteria , sometimes fungal infections

Answer 2

Infectious diseases are caused by microorganisms that enter your body, through a contaminated source, which can be food, water, a person, air, etc.

These microorganisms can be either bacteria, fungi, viruses, etc.

Hope it helped,

BioTeacher101