Influenza, more generally known as "the flu" is a viral infection that might feel like a common cold at first. The sneezing, coughing, sore throat and runny nose will likely seem familiar, but if you start experiencing a high fever (over 100 degrees Fahrenheit), chills and/or sweats and aching muscles, it may be the flu. One of the most effective ways to prevent influenza is to get an injectable flu vaccine. Though the flu tends to target young children and older adults, the Centers for Disease Control and Prevention recommends that everyone six months and older get an annual flu vaccination, with rare exception. Here are answers to some common questions about the flu: