Multiple choice general knowledge science & technology

Which virus causes swine flu?

  1. H!N1virus

  2. H1N1virus

  3. H1N!virus

  4. H-1N-1virus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Swine flu is caused by the H1N1 influenza virus strain. The H and N refer to hemagglutinin and neuraminidase proteins on the virus surface. The 2009 pandemic was caused by a novel H1N1 strain that was a reassortment of bird, swine, and human flu viruses. Options A and C have '!' instead of '1', and option D has incorrect hyphen placement.

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