PUNE, INDIA, February 3, 2017 / EINPresswire.com / — Summary Influenza, often referred to as the flu, is an acute infection caused by one of the three closely related viruses, designated as influenza Type A, B, and C. The infection’s rapid onset and potential for high morbidity and mortality, particularly in high-risk patient populations such as the elderly and young children, make prompt and effective treatment with antiviral medication very difficult. For these reasons, prophylactic vaccination is the preferred intervention for seasonal influenza .