Colds are common because of
A) domestic animals serve as a persistent reservoir.
B) immunity once obtained is not protective.
C) a lack of effective antiviral drugs.
D) the antigenic diversity of the rhinoviruses and the lack of long lasting immunity.
Correct Answer:
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Q3: In those cases of pneumonia for which
Q4: Congenital rubella syndrome usually occurs in the
Q8: Mumps is caused by a _.
A)morbillis virus
B)paramyxovirus
C)adenovirus
D)synctial
Q10: A feature of smallpox not associated with
Q13: Diagnosis of West Nile virus infection is
Q14: Which of the following syndromes may result
Q16: In humans,equine encephalitis can present as a
Q18: Chickenpox is caused by the _ virus.
A)rubella
B)rubeola
C)coxsackievirus
Q18: It is feared that the H5N1 strain
Q20: In influenza virus,antigenic shift
A)results from reassortment of
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