Multiple choice

H5N1 virus is a subtype of

  1. influenza virus D

  2. influenza virus B

  3. influenza virus A

  4. influenza virus C

Reveal answer Fill a bubble to check yourself
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.