题目内容

Which antigen is used to divide influenza viruses onto types A, B and C? ()

A. HA+NA
B. NP+MP
C. M1P
D. M2P
E. RNP

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All of the following are stable at pH 3 EXCEPT ()

A. Coxsackie A Viruses
B. Coxsackie B Viruses
C. Echoviruses
D. Polioviruses
E. Rhinoviruses

Of the following viruses, which one mostly establish subclinical infection? ()

A. Measles virus
B. Polio virus
C. Rabies virus
D. Hantann virus
E. HBV

Which virus spread by the fecal-oral route? ()

A. HAV
B. HBV
C. HIV
D. Influenza virus
E. Rubella virus

This hepatitis virus is a defective virus in that it cannot replicate independently without the presence of hepatitis B virus. ()

A. Hepatius A
B. Hepatitis B
C. Hepatitis C
D. Hepatitis D
E. Hepatitis E