Koplik spot was helpful for the diagnosis of ()
A. influenza virus
B. measles virus
C. mumps virus
D. cytomegalovirus
E. none of the above
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All of the followings are common characteristics of enterovirus except ()
A. Belong to picornaviridae
B. Cause outer enteric symptom such as the meningitis
C. The virus propagates in the intestine and presents in the stools
D. Virus genome RNA is not infectious
E. none of the above
Pilio patient's contagious excrement is ()
A. Blood
B. stool
C. urine
D. Saliva
E. none of the above
HDV coinfect host with which of the following virus ()
A. HAV
B. HBV
C. HCV
D. HEV
E. none of the above
Anti-HBs(+), anti-HBc(-), HBsAg(-) in the serum, the most likely explanation is()
A. HBV carriers
B. has already become chronic hepatitis B
C. The serum has infectivity
D. has already recover from hepatitis B
E. none of the above
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