for influenza virus antigenic shift and the outcomes。РРDescribe the types of hepatitis viruses, transmission routes and the relation with HCC.РРDepict the common infection characteristics for herpes viruses by examples, please。РРРРPart Ⅳ Case Questions （7pts+8pts=15pts）РРInstruction ： (1) Write the answers in the answer sheets 。 You do not need to rewrite the questions in the answer sheets ， just write the answer after the question number. (2) A concise answer to exactly meet the question is preferable.РРРPlease describe the differences of attenuated vaccines and killed vaccines in terms of the inoculation methods ， inoculation times ， protective period, antibody types, and storage. （7pts）РРPlease explain the clinical significance of HBV serologic markes in patients with hepatitis.(8pts)
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