H5N1 virus is a subtype of
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influenza virus D
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influenza virus B
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influenza virus A
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influenza virus C
C
Correct answer
Explanation
H5N1 is a subtype of Influenza A virus. Influenza A viruses are classified based on two surface proteins: hemagglutinin (H) and neuraminidase (N). H5N1 is an avian influenza subtype that can infect humans and has caused pandemic concerns.