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The Centers for Disease Control and Prevention assigns the most virulent microbes known to cause human disease to biosafety level 4.

A) True
B) False

Correct Answer

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Virulence refers to the degree of pathogenicity manifested by a microbe, not simply whether or not it causes disease.

A) True
B) False

Correct Answer

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Infections that go unnoticed because there are no symptoms are called ______.


A) syndromes
B) malaise
C) inflammation
D) asymptomatic
E) secondary infections

F) B) and E)
G) B) and D)

Correct Answer

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An inanimate object that harbors and transmits a pathogen is a ______.


A) fomite
B) carrier
C) vector
D) reservoir
E) source

F) D) and E)
G) B) and D)

Correct Answer

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