<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 complication  <response>: A most impoant complication is pneumonia which is mainly due to bacterial superinfection REF:MICROBIOLOGY ANANTHA NARAYANAN NINTH EDITION PAGE.500 