Which of the following phrases about infectious diseases is always true?
a. They are contagious from person to person.
b. They can be stopped by consistent and adequate handwashing.
c. They are caused by pathogenic organisms in the body.
d. They can be eradicated by vaccinating people around the world.
C
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A Incorrect. Not all infectious diseases are communicable.
B Incorrect. Not all infectious diseases can be stopped by consistent and adequate handwashing.
C Correct. An infectious disease is any disease caused by invasion and multiplication of microorganisms in the body.
D Incorrect. Not all infectious diseases can be eradicated by vaccinating people around the world.
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