Multiple Choice
A vaccine for the common cold is not possible because
A) the surface antigens of rhinovirus mutate frequently.
B) there are more than 100 types of rhinovirus.
C) the causative agent of colds is unknown.
D) the rhinovirus cannot be grown in sufficient quantities.
E) rhinoviruses are resistant.
Correct Answer:
Verified
Correct Answer:
Verified
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