Multiple Choice
Which of the following statements about the development of infectious diseases is correct?
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21. Principles of Disease
Characteristics of Infectious Disease
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If an individual is a carrier of an infectious disease, he is __________.
A
unable to infect others with the disease
B
showing severe symptoms of the disease
C
harboring the pathogen without showing symptoms
D
immune to the pathogen and cannot transmit it
Verified step by step guidance1
Understand the definition of a 'carrier' in the context of infectious diseases: a carrier is an individual who harbors a pathogen but does not show symptoms of the disease.
Recognize that carriers can still transmit the pathogen to others, even if they themselves are asymptomatic.
Eliminate options that contradict this understanding: 'unable to infect others' and 'immune to the pathogen and cannot transmit it' are incorrect because carriers can spread the disease.
Also eliminate 'showing severe symptoms' because carriers, by definition, do not show symptoms.
Conclude that the correct description of a carrier is 'harboring the pathogen without showing symptoms.'
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