Answer
Infection is when harmul pathogens evades/passes through the body's external defense barriers, multiply, and establish themselves in the host body. But infection may not always result in diseases/morbidities. The pathogen just successfully entering the body is infection.
Whereas, morbidity is when the pathogen that had efficiently evaded past the defenses causes enough harm to disrupt the normal functioning of the host body. Morbidity is the change in normal health state and is commonly known as disease.
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