Multiple choice

Which of the following statements regarding the phathogenesis of influenza viruses is INCORRECT?

  1. Incubation period varies from 1-4 days.

  2. Release of IFN from infected cells protect both adjacent and distal cells.

  3. Cell damage leads to the attraction of phagocytes.

  4. The ciliated cells of respiratory tract are main cites of infection.

  5. Viral NA increases the viscosity of the mucous film.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Viral NA lowers the viscosity of the mucous film, promoting the spread of virus containing fluid to lower portions of the tract.

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