<prompt> Which of the following is true regarding influenza?It is caused by an enveloped DNA virusLaboratory studies may show neutropenia early in the course of diseasePrimary infectious pneumonia is less common than secondary bacterial pneumoniaAntiviral agents given early prevents complications  <response>: Ans is c i.e., Primary infectious pneumonia is less common than secondary bacterail pnemonia Primary intluenzal viral pneumonia is less common than secondary bacterial pneumonia. 