Microbiology Which of the following is true regarding influenza? A It is caused by an enveloped DNA virus B Laboratory studies may show neutropenia early in the course of disease C Primary infectious pneumonia is less common than secondary bacterial pneumonia D Antiviral agents given early prevents complications 💡 Explanation Which of the following is true regarding influenza? ✓ Correct Answer: C. Primary infectious pneumonia is less common than secondary bacterial pneumonia