We must remember the flu is a more severe cold. Usually drinking plenty of fluids, rest, gargling with salt water, and use of a drainage mechanism such as a neti pot you will most likely be fine. There are some rare cases when getting the flu may cause other complications such as death. My previous post from December 4th gives you ways to prevent the flu that way you won't have to deal with taking the vaccine then having to take more drugs to combat the symptoms that was suppose to prevent it in the first place.
**Please note this is not a recommendation of care. You should speak to your primary care physician to discuss any options.